排序方式: 共有31条查询结果,搜索用时 15 毫秒
21.
R. J. Chen H. Otsu V. Lapoux S. Boissinot H. Baba A. Matta M. Kurata-Nishimura E. Pollacco Y. Blumenfeld F. Flavigny S. Franchoo N. Fukuda P. Gangnant F. Hammache C. Houarner N. Inabe D. Kameda J. F. Libin C. Louchart M. Matsushita T. Motobayashi L. Nalpas E. Y. Nikolskii A. Obertelli T. Onishi E. Rindel P. Rosier H. Sakurai F. Saillant M. Takechi S. Takeuchi Y. Togano K. Yoneda A. Yoshida K. Yoshida 《Few-Body Systems》2013,54(7-10):1405-1407
Proton elastic scatterings of neutron-rich nuclei 23F and 25F have been measured for the first time at 289 and 298 MeV/nucleon, respectively, using the MUST2 silicon strip detector array and RIBF facility at RIKEN. The differential cross section of 25F was found to be smaller than the calculation with the global potential by Koning and Deraloche. The small cross section of 25F can be well reproduced by an optical model calculation with a shallow and long-tail potential. 相似文献
22.
FAISAL Jamil-Qureshi 楼建玲 叶沿林 曹中鑫 江栋兴 郑涛 华辉 李智焕 李湘庆 葛愉成 庞丹阳 李奇特 肖军 吕林辉 乔锐 游海波 陈瑞九 卢飞 Sakurai H Otsu H Nishimura M Sakaguchi S Baba H Togano Y Yoneda K 李琛 王硕 王赫 李阔昂 Nakamura T Nakayama Y Kondo Y Deguchi S Satou Y Tshoo K H 《中国物理快报》2010,27(9):65-68
Differential cross sections for the elastic scattering of halo nucleus 6He on proton target were measured at 82.3 MeV/u. The experimental results axe well reproduced by optical model calculations using global potential KD02 with a reduction of the depth of real volume part by a factor of 0.7. A systematic analysis shows that this behavior might be related to the weakly bound property of unstable nuclei. 相似文献
23.
Z. Elekes Zs. Dombrádi A. Saito N. Aoi H. Baba K. Demichi Zs. Fülöp J. Gibelin T. Gomi H. Hasegawa N. Imai M. Ishihara H. Iwasaki S. Kanno S. Kawai T. Kishida T. Kubo K. Kurita Y. Matsuyama S. Michimasa T. Minemura T. Motobayashi M. Notani T. K. Ohnishi H. J. Ong S. Ota A. Ozawa H. K. Sakai H. Sakurai S. Shimoura E. Takeshita S. Takeuchi M. Tamaki Y. Togano K. Yamada Y. Yanagisawa K. Yoneda 《The European physical journal. Special topics》2007,150(1):99-102
This paper reports on the 1H(28Ne,28Ne) and 1H(28Ne,27Ne)
reactions studied at intermediate energy using a liquid hydrogen target. From
the cross section populating the first 2+ excited state of 28Ne, and using the previously
determined B(E2) value, the neutron quadrupole transition matrix element has been
calculated to be Mn=13.8 ±3.7 fm2.
In the neutron knock-out reaction, two low-lying excited states were populated in 27Ne.
Only one of them can be interpreted by the sd shell model while the additional state
may intrude from the fp shell. These experimental observations
are consistent with the presence of fp shell configurations at low excitation energy
in 27,28Ne nuclei caused by a vanishing N=20 shell gap at Z=10. 相似文献
24.
H.J.Ong N.Imai D.Suzuki H.Iwasaki H.Sakurai T.Onishi M.Suzuki S.Otas S.Takeuchi T.Nakao Y.Togano Y.Kondo N.Aoi H.Baba B.Shawn Y.Ichikawa M.Ishihara T.Kubo K.Kurita T.Motobayashi T.Nakamura T.Okumura Y.Yanagisawa 《原子核物理评论》2009,26(Z1)
The lifetime of the first excited 2~+ state in ~(18)C was measured using an upgraded recoil shadow method to determine the electric quadrupole transition.The measured mean lifetime is 18.9±0.9 (stat)±4.4 (syst) ps,which corresponds to a B(E2;2~+_1→0~+_(gs)) value of (4.3±0.2±1.0) e~2fm~4,or about 1.5 Weisskopf units.The mean lifetime of the first 2~+ state in ~(16)C was remeasured to be about 18 ps,about four times shorter than the value reported previously.This discrepancy was explained by incorporating the γ-ray angular distribution measured in this work into the previous measurement.The observed transition strengths in ~(16,18)C are hindered compared to the empirical transition strengths,indicating that the anomalous hindrance observed in ~(16)C persists in ~(18)C. 相似文献
25.
Y. Satou K. Tshoo H. Bhang S. Choi J. W. Hwang T. Nakamura Y. Kondo Y. Nakayama N. Kobayashi K. N. Tanaka S. Deguchi Y. Kawada N. Tanaka T. Motobayashi H. Sakurai H. Otsu N. Aoi S. Takeuchi K. Yoneda Y. Togano M. Ishihara S. Shimoura T. Kobayashi M. Matsushita T. Honda T. Sumikama Y. Miyashita K. Yoshinaga N. A. Orr F. M. Marques J. Gibelin F. Delaunay D. Sohler T. Zheng Z. H. Li Z. X. Cao 《Few-Body Systems》2013,54(1-4):287-290
The neutron-rich oxygen isotope 23O has been investigated via proton inelastic scattering on a liquid hydrogen target at 63.5 MeV/nucleon. The invariant mass method in inverse kinematics was employed to reconstruct the energy spectrum. A sharp resonance state was observed at 42(5) keV above the neutron threshold. A comparison of the differential cross section leading to this state with a microscopic DWBA calculation allowed a J π assignment of 5/2+ for this state. 相似文献
26.
Y. Satou T. Nakamura N. Fukuda T. Sugimoto Y. Kondo N. Matsui Y. Hashimoto T. Nakabayashi T. Okumura M. Shinohara T. Motobayashi Y. Yanagisawa N. Aoi S. Takeuchi T. Gomi Y. Togano S. Kawai H. Sakurai H.J. Ong T.K. Onishi S. Shimoura M. Tamaki T. Kobayashi H. Otsu Y. Matsuda N. Endo M. Kitayama M. Ishihara 《Physics letters. [Part B]》2008
The neutron-rich carbon isotopes 19,17C have been investigated via proton inelastic scattering on a liquid hydrogen target at 70 MeV/nucleon. The invariant mass method in inverse kinematics was employed to reconstruct the energy spectrum, in which fast neutrons and charged fragments were detected in coincidence using a neutron hodoscope and a dipole magnet system. A peak has been observed with an excitation energy of 1.46(10) MeV in 19C, while three peaks with energies of 2.20(3), 3.05(3), and 6.13(9) MeV have been observed in 17C. Deduced cross sections are compared with microscopic DWBA calculations based on p-sd shell model wave functions and modern nucleon–nucleus optical potentials. Jπ assignments are made for the four observed states as well as the ground states of both nuclei. 相似文献
27.
T YokoyaA Chainani T KissK Hirata Y TakanoK Togano H KitoH Ihara S Shin 《Journal of Physics and Chemistry of Solids》2002,63(12):2141-2144
We study the superconducting electronic structures of Nb3Al and MgB2 using high-resolution spectroscopy. The obtained spectrum of Nb3Al measured below Tc shows clear opening of the superconducting gap with a sharp pile up in the density of states and a shift of the leading edge. In addition, the spectrum shows a peak-dip-hump line shape expected from the strong-coupling theory. On the other hand, for MgB2, the superconducting-state spectrum measured at 5.4 K shows a coherent peak with a shoulder structure, in sharp contrast to that expected from a single isotropic gap. The superconducting spectral shape of MgB2 can be explained in terms of a multicomponent gap. 相似文献
28.
Superconductivity at about 8 K was observed in the metal-rich Li-Pd-B ternary system. Structural, microstructural, electrical, and magnetic investigations for various compositions proved that the Li2Pd3B compound, which has an antiperovskite cubic structure composed of distorted Pd6B octahedrons, is responsible for the superconductivity. This is the first observation of superconductivity in metal-rich ternary borides containing alkaline metal and Pd as a late transition metal. The compound prepared by arc melting has a high density and is relatively stable in the air. The upper critical fields H(c2)(0) estimated by linear extrapolation and the Werthamer-Helfand-Hohenberg theory are 6.2 and 4.8 T, respectively. 相似文献
29.
Elekes Z Dombrádi Z Aoi N Bishop S Fülöp Z Gibelin J Gomi T Hashimoto Y Imai N Iwasa N Iwasaki H Kalinka G Kondo Y Korsheninnikov AA Kurita K Kurokawa M Matsui N Motobayashi T Nakamura T Nakao T Nikolskii EY Ohnishi TK Okumura T Ota S Perera A Saito A Sakurai H Satou Y Sohler D Sumikama T Suzuki D Suzuki M Takeda H Takeuchi S Togano Y Yanagisawa Y 《Physical review letters》2007,98(10):102502
Neutron single particle energies have been measured in 23O using the 22O(d,p)23O*-->22O+n process. The energies of the resonant states have been deduced to be 4.00(2) MeV and 5.30(4) MeV. The first excited state can be assigned to the nu d3/2 single particle state from a comparison with shell model calculations. The measured 4.0 MeV energy difference between the nu s1/2 and nu d3/2 states gives the size of the N=16 shell gap which is in agreement with the recent USD05 ("universal" sd from 2005) shell model calculation, and is large enough to explain the unbound nature of the oxygen isotopes heavier than A=24. The resonance detected at 5.3 MeV can be assigned to a state out of the sd shell model space. Its energy corresponds to a approximately 1.3 MeV sized N=20 shell gap, therefore, the N=20 shell closure disappears at Z=8 in agreement with Monte Carlo shell model calculations using SDPF-M interaction. 相似文献
30.
Ma YuGang Fang DeQing Sun XiaoYan Zhou Pei Cai XiangZhou Chen JinGen Guo Wei Tian WenDong Wang HongWei Zhang GuoQiang Cao XiGuang Fu Yao Hu ZhengGuo Wang JianSong Wang Meng Togano Y. Aoi N. Baba H. Honda T. Okada K. Hara Y. Ieki K. Ishibashi Y. Itou Y. Iwasa N. Kanno S. Kawabata T. Kimura H. Kondo Y. Kurita K. Kurokawa M. Moriguchi T. Murakami H. Oishi H. Ota S. Ozawa A. Sakurai H. Shimoura S. Shioda R. Takeshita E. Takeuchi S. Yamada K. Yamada Y. Yasuda Y. Yoneda K. Motobayashi T. 《中国科学:物理学 力学 天文学(英文版)》2011,54(1):18-23
Two-proton relative momentum distributions from the break-up channels 23Al→p+p+21Na and 22Mg→p+p+20Ne at an energy of 60–70 A MeV have been measured together with two-proton opening angles at the projectile fragment separator beamline (RIPS) in the RIKEN Ring Cyclotron Facility. The results demonstrate the existence of diproton emission component from single-step 2He for highly excited 23Al and 22Mg. 相似文献