共查询到20条相似文献,搜索用时 46 毫秒
1.
H. A. Schüssler 《Zeitschrift für Physik A Hadrons and Nuclei》1965,182(3):289-305
To study the modification of the value of the nuclear quadrupole moment obtained without Sternheimer correction from measurements in states with different principal quantum numbers, the hyperfine structure splitting of the 52 P 3/2 and the 62 P 3/2 excited states of Rb I has been investigated with the optical double resonance method. The experiments, in which isotopic enriched samples of Rb85 and Rb87 were used, have been carried out in the 52 P 3/2 state without a static magnetic field. In the 62 P 3/2 state, a static magnetic field was applied. For the 52 P 3/2 state, the hyperfine structure constants areA(Rb85)=25.029(16) Mc/s,B(Rb85)=26.032(70) Mc/s,A(Rb87)=84.852(30) Mc/s,B(Rb87)=12.611(70) Mc/s. The corresponding constants for the 62 P 3/2 state areA(Rb85)=8.25(10) Mc/s,B(Rb85)=8.16(20) Mc/s,A(Rb87)=27.96(35) Mc/s,B(Rb87)=3.95(10) Mc/s. The values of the nuclear quadrupole moments, derived from both finestructure states, can be brought into agreement when the Sternheimer core correction is applied. The Landé factor for the 62 P 3/2 state isg j=1.334(1). 相似文献
2.
G. Fricke H. Kopfermann S. Penselin K. Schlüpmann 《Zeitschrift für Physik A Hadrons and Nuclei》1959,156(3):416-424
The hyperfine structure splittings of the electronic ground states2 D 3/2 and2 D 3/2 of the stable isotope Sc45 have been measured by the atomic beam magnetic resonance method. From these splittings the magnetic dipole and electric quadrupole interaction constants are found to bea 3/2=(269,560±0,02) Mc/sb 3/2=?(26,37±0,1) Mc/sa 5/2=(109,034±0,01) Mc/sb 5/2=?(37,31±0,1) Mc/s. The values of the electric quadrupole moment calculated fromb 3/2 andb 5/2 differ by about 5% indicating that the configuration 3d 4s 2 of the ground states is perturbed by higher configurations. Averaging these two values we obtain for the quadrupole moment of Sc45 Q(Sc45)=?(0,22±0,01) · 10?24 cm2. 相似文献
3.
H. Liening 《Zeitschrift für Physik A Hadrons and Nuclei》1974,266(4):287-297
Lifetimes and hfs coupling constants of some excited states of the 4d 9 5p configuration of Pd I have been determined in a level crossing experiment by observing the field dependence of the polarization of the fluorescence radiation in a magnetic field. From the halfwidths of the measured zero field level crossing signals one obtains the mean lifetimes of the following fine structure states:τ(3P 1 0 )=(7.46±0.32)nsec;τ(3 P 2 0 )=(6.9±0.76)nsecτ(3P 1 0 )=(4.99±0.35)nsec;τ(3 D 1 0 )=(4.89±0.40)nsecτ((3D 3 0 )=(6.99±0.49)nsec;τ(3 F 4 0 )=(7.09±0.46)nsec.Δm=2 crossing signals were detected in the3 P 1 0 ,3D 3 0 and3F 4 0 -states of the odd isotope105Pd. A detailed analysis of the experimental curves yields the hfs coupling constantsA andB of these states:A(3P 1 0 )=?(133±2) Mc/sec;B(3 P 1 0 )=(140±30) Mc/secA(3D 3 0 )=?(120±10) Mc/sec;B(3 D 3 0 )=?(660±100) Mc/secA(3F 4 0 )=?(87±2) Mc/sec;B(3 F 4 0 )=?(330±30) Mc/sec. A theoretical calculation of the hfs constants is given on the basis of reduced matrix elements. Within the limit of the errors these values agree with the experimental ones. The nuclear electric quadrupole moment deduced from the measuredB values isQ (105Pd)=(0.8±0.3)·10?24 cm2 (without corrections). 相似文献
4.
The hyperfine structure of the 62 P 3/2 state of Rb87 has been reinvestigated with optical double resonance in zero magnetic field. The results for the hfs-splitting constants areA(62 P 3/2, Rb87)=27.70 (2) Mc/s andB(62 P 3/2, Rb87)=3.94 (4) Mc/s. From these constants one obtains a value for the nuclear quadrupole moment uncorrected for shielding effects ofQ=+0.138 (1)·10?24 cm2. 相似文献
5.
Gisbert zu Putlitz 《Zeitschrift für Physik A Hadrons and Nuclei》1963,175(5):543-552
In order to determine the electric quadrupole moment of Sr87 (I= 9/2) the hyperfine structure-splitting of the 5s5p 3 P 1-state of the SrI-spectra was investigated by optical double resonance. By detection of high frequency transitions (ΔF=±1,Δm F=0,±1) in an external magnetic fieldH 0≈0 one obtains the hyperfine structure separations asv F=11/2?F=9/2=1463·149 (6) Mc/sec andv F=9/2?F=7/2=1130·264 (6) Mc/sec. From these frequencies one calculates the magnetic hyperfine structure-splitting constantA=?260·084 (2) Mc/sec and the electric quadrupole interaction constantB=?35·658 (6) Mc/sec. B leads to an electric quadrupole moment ofQ(Sr87)=+0·36 (3)·10?24 cm2. 相似文献
6.
Hans Ackermann 《Zeitschrift für Physik A Hadrons and Nuclei》1966,194(3):253-269
The hyperfine structure of the 32P3/2 State of Na23has been measured by the optical double resonance technique in a magnetic field of 3.1 kG sufficiently strong to decouple completelyI andJ. In the case of π or (σ++σ?) excitation the double resonance signal represents the superposition curve of eight unresolved radio-frequency transitions. The dependence of the signal on the pressure of sodium vapour and the radio-frequency field strength has been studied. The analysis of the experimental curves yields for the hyperfine coupling constants the valuesa=(18.7±0.4) Mc/s andb=(3.4±0.4) Mc/s. The nuclear electric quadrupole moment derived from the ratio ofb/a isQ=(0.146±0.02) · 10?24cm2. The Lande factor and the lifetime for the 32P3/2state are gJ=1.3344±0.0004 and τ=(1.61±0.07) · 10?8 sec. 相似文献
7.
Ekkehard Recknagel 《Zeitschrift für Physik A Hadrons and Nuclei》1960,159(1):19-32
The hyperfine structure of the groundstate 6s 2 S 1/2 and the nuclear magnetic dipole moment of gold 197 have been studied by the atomic beam magnetic resonance technique. A special high frequency arrangement is described. The hyperfine structure separationΔ v was determined fromΔF=1 transitions. The magnetic dipole momentμ I was measured by a direct method. The experiments yield the following results:Δv (2S1/2)=(6099,309±0,010) Mc/secμ I (Au197)=+(0,1445±0,0014)μ K. 相似文献
8.
M. Baumann W. Hartmann H. Krüger A. Oed 《Zeitschrift für Physik A Hadrons and Nuclei》1966,194(3):270-279
The hyperfine structure of the 32P3/2-state in the Na(I)-spektrum was investigated by optical double resonance. Three zero fieldrf-transitions (ΔF=±1, ΔmF=0) were detected and thus the unambiguous interpretation of therf-spectrum was made possible. From an analysis of therf-spectrum one obtains the magnetic hyperfine structure splitting constant a=(18.5 ?0.2 +0.6 ) Mc/sec the electric quadrupole interaction constantb=(3.2±0.5) Mc/sec which yields an electric quadrupole moment Q(Na23)=(0.138±0.025)·1024cm2. 相似文献
9.
E. Bodenstedt H. J. Körner E. Gerdau J. Radeloff L. Mayer K. Auerbach J. Braunsfurth G. Mielken 《Zeitschrift für Physik A Hadrons and Nuclei》1962,170(4):355-366
The rotation of the angular correlation between theγ-group at about 820 keV and the 80 keV radiation in the decay of Tm168 has been observed in an external magnetic field of 20300 gauss. The result:ω R·τ=0,485±0,051 yields for theg R -factor of the 80 keV state of Er168:g R =+0,25±0,03. The evaluation includes a paramagnetic correction factor of:β=7,26, (B eff=β·B ext). The angular correlation is slightly attenuated by internal fields. For a liquid source of Tm (NO3)3 solved in 3 n HNO3, a measurement of the differential angular correlation as a function of the delay time gave:λ 2=(5,8±2,9)·107sec?1, assumingA 2(t)=A 2(0)·e ?λ 2·t. The half life of the 80 keV state was found to be:T 1/2=(1,92±0,04)·10?9sec in agreement with earlier measurements. 相似文献
10.
The double-resonance method has been used to measure the hyperfinestructure of the 52 P 3/2-term in the potassium I-spectrum, using a sample enriched in theK 40 isotope. The interaction constants ofK 40 have been determined to beA 40=?(2.450±0.046) MHz andB 40=?(1.31±0.33) MHz. From these the electric quadrupolmoment has been calculated to be
$$Q(K^{40} ) = - (0 \cdot 093 \pm 0 \cdot 025) \cdot 10^{ - 24} cm^2 .$$ 相似文献
11.
Wolfgang Fischer Harry Hühnermann Klaus-Johannes Kollath 《Zeitschrift für Physik A Hadrons and Nuclei》1967,200(2):158-164
The hyperfinestructure of the transition65CuI, 3d 104p 2 P 3/2—3d 94s 2 m 2 D 5/2 was investigated by optical interferometric methods. For the hfs-factors the following values were found:A(65Cu,m 2 D 5/2)=26,79(3) mK andB(65Cu,m 2 D 5/2)=5,81(10) mK. The core polarization of them 2 D-terms and the Sternheimer corrections in the calculation of the quadrupolmoment of copper 65 from theB-factors of the terms 3d 9 4s2 m 2 D and 3d 10 4p 2 P 3/2. were discussed. 相似文献
12.
Level crossings obeying the selection ruleΔm=2 have been detected in the 62 P 3/2-state of both Rb85 and Rb87. Using the measured crossing points, the ratios of the hyperfinestructure constants to theg J -factor are determined from a calculation for intermediate magnetic fields. The ratios areA 85/g J =6.119 (3) Mc/s,B 85/g J =6.14 (2) Mc/s,A 87/g J =20.70 (3) Mc/s,B 87/g J =2.93 (5) Mc/s. From the zero field level crossing of Rb87 the lifetimeτ=1.14 (6) · 10?7sec of the 62P3/2-state is obtained. Level crossing signals have also been observed in the presence of noble gas admixtures. 相似文献
13.
The scattering of Au-resonance line λ=2427 Å on an atomic heam was observed in external magnetic field by level crossing technic. Using the assumed interpretationB/A ? 1 for the hyperfinestructure-interaction of Au197 in the2P3/2-term a valueB ≈ll mK for the nuclear quadrupol-interaction constant is deduced. 相似文献
14.
D. v. Ehrenstein H. Kopfermann S. Penselin 《Zeitschrift für Physik A Hadrons and Nuclei》1960,159(2):230-231
The hyperfine structure splittings of the electronic ground statea 4 F 9/2 in the Co59-I-spectrum have been measured with a magnetic atomic-beam resonance-apparatus. From these splittings the magnetic dipole and electric quadrupole interaction constants are found to beA (a 4 F /2)=(450,284±0,01) Mc/sec,B (a 4 F 9/2)= (139,63±0,5) Mc/sec. Taking into account the mixture of thea 4 F 9/2 state with states of the same 3d 7 4s 2-electron-configuration, an electric quadrupole moment of Co59 ofQ=(0,404±0,04) 10?24 cm2 was obtained. No Sternheimer-correction has been included. 相似文献
15.
W. Collin H. Daniel O. Mehling H. Schmitt G. Spannagel K. S. Subudhi 《Zeitschrift für Physik A Hadrons and Nuclei》1964,180(2):143-149
In the decay of Fe59 the following quantities have been measured:γ-ray intensities, conversion coefficients andβ-(circularly polarizedγ) correlations. The conversion coefficients were found to be: for the 1.10 MeVγ-transition, αtot.=(1.36±0.10)·10?4 and for the 1.29 MeVγ-transition, αtot.=(1.07±0.08)·10?4. The asymmetry parameterA of the correlationβ(0.27 MeV)?γ(1.29 MeV) were measured to beA= ?0.17±0.10, and forβ(0.46 MeV)?γ(1.10 MeV),A=?0.13±0.04. From these data and publishedγ?γ angular correlation measurements the following spins of Co59 levels could be deduced: 1.10 MeV,I=5/2?; 1.29 MeV,I=5/2?; and 1.43 MeV,I=3/2?. The two strongβ-ray groups are pure Gamow-Teller transitions (ΔI=1). The multipolarities of all fiveγ-rays are given. 相似文献
16.
This contribution reports an ab initio study of 18 ion-pair states of the Br2 molecule correlating with the Br+(3PJ=2,1,0,1D2) +Br–(1S0) dissociation asymptotes. Calculations were performed on the CASSCF/CASPT2 level of theory taking into account electron correlations and with inclusion of the spinorbit coupling. Ab initio results are compared with the experiment. For gerade and ungerade ion-pair potentials, the difference between calculated and experimental values of the equilibrium internuclear distance does not exceed ΔRe = ±0.01 and ±0.05 Å, respectively. For the states correlating to the lowest dissociation asymptote Br+(3P2) + Br–(1S0), the accuracy of relative energies is postilions ΔTe ± 0.02 eV. The dipole moment functions for some transitions between the ion-pair and valence states were calculated as well. 相似文献
17.
Jakob Weiss 《Zeitschrift für Physik A Hadrons and Nuclei》1967,203(1):37-48
The time dependence of scintillation intensity from single crystals ofp-terphenyl and mixed crystals ofp-terphenyl and anthracene after bombarding with α-particles was investigated at the two temperaturesT=296 °K andT=92 °K. For the crystals ofp-terphenyl the time dependence of the scintillation anisotropy was also measured. Using the formulas given byKing andVoltz the decay curves ofp-terphenyl were decomposed into two components. Good agreement between experiment and theory was found. The ratio of the prompt intensity to the delayed intensity was determined to be 1∶2 atT=296 °K and 1∶3 atT=92 °K. The diffusion constants for triplet excitons were calculated to beD T(296 °K)≈10?5 cm2 sec?1 andD T(92 °K)≈ 2×10?6 cm2 sec?1, and the triplet-triplet interaction rate constantsχ tt(296 °K)≈ 2.5×10?11 cm3 sec?1 andχ tt(92 °K)≈0.5×10?11 cm3 sec?1. 相似文献
18.
A. G. Gavrilyuk I. A. Troyan I. S. Lyubutin V. A. Sidorov 《Journal of Experimental and Theoretical Physics》2001,92(4):696-700
A diamond anvil cell is used to investigate the effect of high pressure (up to 37.5 GPa) on the optical absorption spectra of a single crystal of nickel oxide (NiO). In addition, strain-gage measurements are used to experimentally investigate the V(P) equation of state at a hydrostatic pressure of up to 8.5 GPa in a high-pressure chamber of the “toroid” type. Measurements are performed at room temperature. Absorption bands are observed, which correspond to optical d-d transitions of Ni2+ ion in the crystal field of ligands 3A2g → 3T2g, 3A2g → {au1}E1g, 3A2g → 3T1g(F), and 3A2g → 1T2g. The values of energy of these transitions increase linearly with pressure, and their pressure coefficients are 7.3 ± 0.2, 2.87 ± 0.9, 9.7 ± 0.5, and 8.9 ± 0.3 meV/GPa, respectively. The pressure derivative of the crystal field parameter 10Dq corresponding to the 3A2g → 3T2g transition gives the pressure dependence of the magnitude of exchange integral J in the Anderson hybridization model. It is found that, in the pressure range from zero to 37.5 GPa, the behavior of the exchange integral J is largely defined by the hybridization parameter b = (10Dq/3). At the same time, the Coulomb interaction parameter Ueff is independent of pressure and, therefore, has no effect on the variation of J. The Coulomb interaction Ueff ≈ 7.47 ± 0.005 eV is determined. The experimental data on the equation of state are used to derive the \(J \propto V^\varepsilon \) correlation, where ε = ?2.99 ± 0.15, which is in good agreement with the predictions of Bloch’s theory (ε = ?10/3). 相似文献
19.
The paramagnetic resonance absorption of trivalent erbium in single crystals of Y2O3 on sites of crystal field symmetry C3i and C2 is investigated at 4.2°K and 9.2 kMc/s. The values of theg-tensors and those of the hyperfine structure parallel to the axes of crystalline fields are:g ‖=12.176,g ⊥=3.319,A=426.4·10?4 cm?1, andg z =12.314,g x =1.645,g y =4.892, andA z =433.2·10?4 cm?1 for the C3i-ions and the C2-ions, respectively. For ions on sites of symmetry C2 the principal axes ofg in the plane perpendicular toz are found ± 2° beside the [100]-directions. This is different from the result on Yb3+ in Y2O3. The dependency ofg on the angle of rotation is determined for the (001)-, (110)-, and (111)-plane. 相似文献
20.
W. Schuler 《Zeitschrift für Physik A Hadrons and Nuclei》1966,192(2):173-181
The circular polarizationP γ of 478 keVγ quanta from the reaction Li6(d, pγ) Li7 with 2 MeV deuterons was measured by forward Compton scattering from magnetized iron. The protons were observed at 25° lab angle. The fast neutron background in theγ detector was suppressed by pulse shape discrimination. The resultP γ=+ 0.022 ± 0.17 with the Basel sign convention confines the ratio of the reduced widthsΘ ± for the capture of the neutron withj=1±1/2 to the regions ?2.36≦Θ +/Θ ?≦?0.74 or ?0.06≦Θ +/Θ ?≦+0.61. 相似文献