Foundations of electrodynamics: S.R. de Groot and L.G. Suttorp, (North-Holland Publishing Company,Amsterdam, 1972. xii-535 pages. Fl. 140.-)

We show that the anomalous dimension of the fundamental field is connected to the anomalous dimensions of the high spin bilinear operators. The dimensions of these operators can be determined by examining the violations of the Bjorken scaling law in deep-inelastic electron-proton scattering. The structure function at field ω near to one has a power dependence of q², the exponent being the anomalous dimension of the “parton” field.     

基于(p,γ)-(γ,p)平衡近似的快质子俘获过程模型及其应用

在(p,γ)-(γ,p)平衡近似下,本文建立了简化的快质子俘获(rp)过程模型, 讨论了天体物理条件输入量 (即质子辐照时间、质子数密度及温度) 对rp过程的影响. 结合中国科学院近代物理研究所等时性质谱仪 (IMS) 上的最新实验数据, 本文进而分析了新测的缺中子原子核质量对rp过程的影响; 发现利用新测的⁴¹Ti质量, A=41处的丰度相较之前的计算结果增大了两个数量级, 而计算的相对丰度误差减小了近两个量级. 关键词： 快质子俘获过程 γ)-(γ,p)平衡')" href="#">(p,γ)-(γ,p)平衡 原子核质量 缺中子原子核     

Nucleon-nucleon final-state interactions in the reactions He(p, d)2p, He(p, t)2p and He(p, He)pn

The energy spectra of deuterons, tritons and ³He particles from the reactions ³He(p, d)2p, ⁴He(p, t)2p and ⁴He(p, ³He)pn have been measured at angles between 6° and 60° lab. The ³He(p, d)2p reaction was studied at both 30.5 and 49.5 MeV incident proton energies, while the other two reactions were studied at 49.5 MeV only. The energy spectra are compared with calculations based on the Watson-Migdal model of final-state interactions.     

Microscopic calculation of cross sections for the reactions 12C(p, 2p) and 16O(p, 2p): U. Wille and R. Lipperheide Nucl. Phys. A189 (1972) 113

Isomeric states of ⁶⁹Se were produced via the heavy-ion compound-nucleus process and from the positon decay of ⁶⁹Br, the former producing a high-spin state and the latter preferentially populating a low-spin state. Ge(Li) detectors as well as scintillation counting showed that the high-spin state decays with T_{$\text{1}\text{2}$} = 14.0 ± 1.0 min to levels in ⁶⁹As, giving rise to γ-rays of 116, 166 and 282 keV. The low-spin state decays predominantly to a state giving rise to a 145 keV γ-ray with T_{$\text{1}\text{2}$} = 1.8 ± 0.2 min. The beta end-point energy of both isomers is 5.2 ± 0.2 MeV. It is deduced that the high-spin state, assigned J^π = $\text{9}\text{2}$⁺, is the ground state; the isomeric state had J^π = $\text{3}\text{2}$^?. The angular momentum inversion as compared to neutron-excess Se isotopes is attributed to Coriolis coupling to a deformed core as described by Malik and Scholz.     

Critical Analysis of Hypothesis Tests in Federal Information Processing Standard (140-2)

This work presents an analysis of the existing dependencies between the tests of the FIPS 140-2 battery. Two main analytical approaches are utilized, the first being a study of correlations through the Pearson’s correlation coefficient that detects linear dependencies, and the second one being a novel application of the mutual information measure that allows detecting possible non-linear relationships. In order to carry out this study, the FIPS 140-2 battery is reimplemented to allow the user to obtain p-values and statistics that are essential for more rigorous end-user analysis of random number generators (RNG).     

A comparison of the He(p, 2p)d and He(p, pd)p reactions

The ³He(p, 2p)d and ³He(p, pd)p reactions have been compared at three bombarding energies from 65 to 100 MeV. A comparison of plane wave impulse approximation calculations to the experimental data indicates that multiple scattering effects are large and energy dependent but that they primarily produce a uniform reduction in cross section. Although multiple scattering effects are large the ratio of the cross sections for the two reactions is in agreement with that predicted by the impulse approximation.     

Investigation of 91Zr by high resolution (d,p), (p,p′) and (p,d) reactions

Energy spectra and angular distributions of light particles (Z = 3–8) produced in the reactions ¹³C+^{58, 60, 64}Ni have been measured at 105 MeV. Coincidence events between light outgoing particles Li, Be, B and α, p have been observed for the first time in the ¹³C+⁵⁸Ni and ¹³C+⁶⁴Ni reactions. The results show that at least part of the ‘deep-inelastic’ events are due to many-particle reactions.     

Levels excited in73Ge by (d,p) and (p,p′) reactions

Angular distributions from the reactions⁷²Ge(d, p)⁷³Ge and⁷³Ge(p, p′)⁷³Ge have been studied with 8.0 MeV deuterons and 12.0 MeV protons, respectively, using the Aldermaston Tandem Van de Graaff generator and multi-angle magnetic spectrograph. The ground stateQ-value of the (d, p) reaction was measured to be 4.571±0.004 MeV. The energies, values of the transferred orbital angular momenta, parities and transition strengths in both reactions were determined by use of distorted-wave Bornapproximation calculations, for levels up to 3 MeV excitation energy. The sums of the transition strengths are compared with shell model calculations as well as with values obtained in neighbouring nuclei. Discrepancies between parity and possible spin assignments of states observed in the two reactions are discussed.     

Kaonic hydrogen and K(-)p scattering

Chiral SU(3) effective field theory in combination with a relativistic coupled-channels approach is used to perform a novel analysis of the strong-interaction shift and width in kaonic hydrogen in view of the new accurate DEAR measurements. Questions of consistency with previous K(-)p data are examined. Coulomb and isospin breaking effects turn out to be important and are both taken into account in this work.     

Level structure of 205Tl observed in (p,p′) and (p, α) reactions

A number of new levels in ²⁰⁵Tl have been observed in the ²⁰⁸Pb(p, α)²⁰⁵Tl and ²⁰⁵Tl(p, p′)²⁰⁵Tl reactions. The spectra observed in these reactions are very different from each other, and from spectra previously observed in the ²⁰⁶Pb(t, α)²⁰⁵Tl and ²⁰⁵Tl(γ,γ′)²⁰⁵Tl reactions. Values of G_L (reduced transition probability in single-particle units) have been deduced from the (p, p′) data; they are in fair agreement with the predictions of the intermediate-coupling model.     

Angular distribution measurements of Li(p,α)He reaction at 140 keV proton energy using nuclear track detectors

Angular distributions of a ⁶Li(p,α) ³He reaction were measured at six angles for 140 keV proton energy using nuclear track detectors (NTDs). The measurements were carried out over 60°–160° lab. angles in 20° increments using a scattering chamber of 80° beam line of the 350 kV accelerator. A semiconductor silicon surface barrier (SSB) detector was placed at +160° and was used as a monitor. The results have shown that the CR-39 detector has excellent capabilities to distinguish 1.4–2.7 MeV α+ ³He particles from the ⁶Li(p,α) ³He reaction and 8–9.4 MeV α-particles from the ⁷Li(p,α) ⁴He reaction through their track diameters. However, it was not possible to distinguish between the 2.3 MeV ³He ions and the 1.7 MeV ⁴He ions from the ⁶Li(p,α) ³He reaction from their track diameter measurements, but it was possible to differentiate between the two, from the darker contrast of the ³He particles caused by its deeper tracks as compared to those of ⁴He.     

Centrality dependence of pi(+/-), K(+/-), p,and (-)p production from sqrt[s(NN)] = 130 GeV Au + Au collisions at RHIC

Identified pi(+/-), K(+/-), p, and (-)p transverse momentum spectra at midrapidity in sqrt[s(NN)] = 130 GeV Au+Au collisions were measured by the PHENIX experiment at RHIC as a function of collision centrality. Average transverse momenta increase with the number of participating nucleons in a similar way for all particle species. Within errors, all midrapidity particle yields per participant are found to be increasing with the number of participating nucleons. There is an indication that K(+/-), p, and (-)p yields per participant increase faster than the pi(+/-) yields. In central collisions at high transverse momenta (p(T) > or =2 GeV/c), (-)p and p yields are comparable to the pi(+/-) yields.     

40≤Z≤44类镍离子3d94s,3d94p,3d94d组态s-p,p-d跃迁的计算

用多组态自洽场方法,结合我们提出的半经验拟合公式,对40≤Z≤44类镍离子3d94s,3d94p,3d94d态的能级进行计算,根据能级拟合值算出s-p,p-d跃迁的谱线波长,并给出各谱线的HFR振子强度.