排序方式: 共有66条查询结果,搜索用时 31 毫秒
41.
Poolman HR Boersma DJ Harvey M Higinbotham DW Passchier I Six E Alarcon R van Amersfoort PW Bauer TS Boer Rookhuizen H van Den Brand JF van Buuren LD Bulten HJ Ent R Ferro-Luzzi M Geurts DG Heimberg P de Jager CW Klimin P Koop I Kroes F van Der Laan J Luijckx G Lysenko A Militsyn B Nesterenko I 《Physical review letters》2000,84(17):3855-3858
We report on first measurements with polarized electrons stored in a medium-energy ring and with a polarized internal target. Polarized electrons were injected at 442 MeV (653 MeV), and a partial (full) Siberian snake was employed to preserve the polarization. Longitudinal polarization at the interaction point and polarization lifetime of the stored electrons were determined with laser backscattering. Spin observables were measured for electrodisintegration of polarized 3He, with simultaneous detection of scattered electrons, protons, neutrons, deuterons, and 3He nuclei, over a large phase space. 相似文献
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Hayes AB Cline D Wu CY Ai J Amro H Beausang C Casten RF Gerl J Hecht AA Heinz A Hughes R Janssens RV Lister CJ Macchiavelli AO Meyer DA Moore EF Napiorkowski P Pardo RC Schlegel Ch Seweryniak D Simon MW Srebrny J Teng R Vetter K Wollersheim HJ 《Physical review letters》2006,96(4):042505
Coulomb activation of the four quasiparticle Kpi=16+ 178Hf isomer (t1/2=31 y) has led to the measurement of a set of Elamda matrix elements coupling the isomer band to the ground band. The present data combined with earlier 178 Hf Coulomb excitation data have probed the components in the wave functions and revealed the onset and saturation of K mixing in low-K bands, whereas the mixing is negligible in the high-K bands. The implications can be applied to other quadrupole-deformed nuclei. 相似文献
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M. Serris C. T. Papadopoulos R. Vlastou C. A. Kalfas S. Kossionides N. Fotiades S. Harissopulos C. W. Beausang M. J. Joyce E. S. Paul M. A. Bentley S. Araddad J. Simpson J. F. Sharpey-Schafer 《Zeitschrift für Physik A Hadrons and Nuclei》1997,358(1):37-45
High — spin states in 122Xe have been investigated by γ ? γ coincidence measurements using the EUROGAM array. The reaction 96Zr(30Si,4n)122Xe at a beam energy of 135 MeV was used to populate states of 122Xe. The level scheme has been extended up to ~ 13.5 MeV and also enriched as compared to previous studies. New structures of competing dipole to quadrupole transitions have been observed. Experimental B(M1)/B(E2) ratios have been extracted for these structures and compared with theoretical estimates. They have also been compared with similar structures in Xe, Ba and Ce nuclei. 相似文献
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N. Fotiades S. Harissopulos C. A. Kalfas S. Kossionides C. T. Papadopoulos R. Vlastou M. Serris J. F. Sharpey-Schafer M. J. Joyce C. W. Beausang P. J. Dagnall P. D. Forsyth S. J. Gale P. M. Jones E. S. Paul P. J. Twin J. Simpson D. M. Cullen P. Fallon M. A. Riley R. M. Clark K. Hauschild R. Wadsworth 《Zeitschrift für Physik A Hadrons and Nuclei》1996,354(1):169-175
High spin states in the isotope194Hg were populated using the150Nd (48Ca,4n) reaction at a beam energy of 213 MeV. The analysis ofγ-γ coincidences has revealed two new structures at excitation energies above 6 MeV and at moderate spin. The two structures are a manifestation of the deviation of nucleus from the collective rotation which dominates its lower excitation behaviour. A comparison with similar structures in the neighbouring Hg isotopes is also attempted. 相似文献
45.
A. Lopez-Martens T. Døssing T. L. Khoo B. Herskind T. Lauristen M. Matsuo K. Yoshida A. Korichi F. Hannachi I. Ahmad H. Amro G. de Angelis D. Bazzacco C. Beausang E. Bouchez P. Bringel I. J. Calderin M. P. Carpenter S. M. Fischer G. Hackman K. Hauschild H. Hübel A. Hurstel R. V. F. Janssens F. G. Kondev W. Korten T. Kröll Y. Le Coz N. Marginean R. Menegazzo E. Mergel D. Napoli N. Nenoff S. Neumann A. Neusser D. Nisius G. Mukherjee M. Rejmund D. Rossbach C. Rossi Alvarez C. Schück G. Schonwasser A. K. Singh Ch Theisen Ch Vieu C. Ur 《The European Physical Journal A - Hadrons and Nuclei》2003,20(1):49-53
We report on four recent results concerning the population and the decay of superdeformed states, namely the structure of excited superdeformed states in 194Hg, the search for fine structure of the last superdeformed transitions in 194Pb, the primary decay-out strength analysis in 194Hg and, as a consequence of this, the possibility of using the decay-out as a tool to study order-to-chaos properties of normally deformed states.Received: 3 December 2002, Published online: 17 February 2004PACS:
21.10.Re Collective levels - 23.20.Lv
transitions and level energies - 24.60.-k Statistical theory and fluctuations - 24.60.Lz Chaos in nuclear systems - 27.80. + w
F. Hannachi: Present address: CENBG/IN2P3, Gradignan, France.H. Amro: Present address: WNSL, Yale, USA.K. Hauschild: Present address: CSNSM/IN2P3, Orsay, France.T. Kröll: Present address: TU, Munich, Germany.M. Rejmund: Present address: GANIL, Caen, France. 相似文献
46.
Cooper JR Krücken R Beausang CW Novak JR Dewald A Klug T Kemper G von Brentano P Carpenter MP Janssens RV Lister CJ Wiedenhöver I 《Physical review letters》2001,87(13):132503
Subpicosecond lifetimes of states in shears band 1 in (197)Pb were measured by means of the recoil distance method employing Gammasphere and the New Yale Plunger Device. The extracted reduced matrix elements, B(M1), show a clear sensitivity to the crossing of different shears configurations reflecting the closing and reopening of the shears blades. The energies and B(M1) values in the band crossing region are successfully described in the framework of the semiclassical model of the shears bands. The relevance of core rotation contributions are shown. The results point to the existence of shears states with an angular momentum coupling angle larger than 90 degrees. 相似文献
47.
F. Azaiez W. H. Kelly W. Korten M. A. Deleplanque F. S. Stephens R. M. Diamond C. W. Beausang J. A. Becker E. A. Henry J. E. Draper M. J. Brinkman S. W. Yates A. Kuhnert E. Rubel 《Zeitschrift für Physik A Hadrons and Nuclei》1990,336(2):243-244
Two superdeformed (SD) bands have been found in194Tl using the reactions176Yb(23Na,5n) and181Ta(18O,5n). The mass assignments were made from excitation function data. These are the first SD bands found in the mass-190 region that are not in Hg nuclei. The energies of many of the transitions of one of these new SD bands are similar in energy to those in the SD band of192Hg. 相似文献
48.
J. Duprat B. J. P. Gall M. G. Porquet F. Hannachi F. Azaiez M. Aïche G. Bastin C. W. Beausang R. Béraud C. Bourgeois R. M. Clark I. Deloncle R. Duffait K. Hauschild H. Hübel M. J. Joyce M. Kaci A. Korichi Y. Le Coz M. Meyer E. S. Paul N. Perrin N. Poffé N. Redon C. Schück H. Sergolle J. F. Sharpey-Schafer J. Simpson A. G. Smith R. Wadsworth 《Zeitschrift für Physik A Hadrons and Nuclei》1994,350(1):5-6
Excited states in the neutron deficient 145 Dy nucleus have been identified by means of the reaction 112Sn(35 Cl,pn) at 159 MeV. The level scheme above the 11/2 ? state and up to spin I~37/2 was obtained using γ-ray spectroscopy methods. The level structure is discussed in terms of the coupling of a h 11/2 neutron hole with the N=80 core excitations. 相似文献
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