Spectroscopy of 13B via the 13C(t,3He) reaction at 115A MeV

被引：16

作者：

Guess, C. J. ^{[1
,2
,3
]}

Zegers, R. G. T. ^{[1
,2
,3
]}

Brown, B. A. ^{[1
,2
,3
]}

Austin, Sam M. ^{[1
,3
]}

Bazin, D. ^{[1
]}

Caesar, C. ^{[1
,4
]}

Deaven, J. M. ^{[1
,2
,3
]}

Grinyer, G. F. ^{[1
]}

Herlitzius, C. ^{[1
,4
]}

Hitt, G. W. ^{[1
,2
,3
]}

Noji, S. ^{[5
]}

Meharchand, R. ^{[1
,2
,3
]}

Perdikakis, G. ^{[1
,3
]}

Sakai, H. ^{[5
]}

Shimbara, Y. ^{[6
]}

Tur, C. ^{[1
,3
]}

机构：

[1] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA

[2] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[3] Michigan State Univ, Joint Inst Nucl Astrophys, E Lansing, MI 48824 USA

[4] Johannes Gutenberg Univ Mainz, Mainz, Germany

[5] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[6] Niigata Univ, Grad Sch Sci & Technol, Niigata 9502181, Japan

来源：

PHYSICAL REVIEW C | 2009年 / 80卷 / 02期

基金：

美国国家科学基金会;

关键词：

BETA-DECAY; GIANT-RESONANCES; ENERGY-LEVELS; SCATTERING; STATES; BE-12; HE-3;

D O I：

10.1103/PhysRevC.80.024305

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Gamow-Teller and dipole transitions to final states in B-13 were studied via the C-13(t,He-3) reaction at E-t=115A MeV. In addition to the strong Gamow-Teller transition to the B-13 ground state, a weaker Gamow-Teller transition to a state at 3.6 MeV was found. This state was assigned a spin-parity of 3/2(-) by comparison with shell-model calculations using the WBP and WBT interactions which were modified to allow for mixing between nh omega and (n+2)h omega configurations. This assignment agrees with a recent result from a lifetime measurement of excited states in B-13. The shell-model calculations also explained the relatively large spectroscopic strength measured for a low-lying 1/2(+) state at 4.83 MeV in B-13. The cross sections for dipole transitions up to E-x(B-13)=20 MeV excited via the C-13(t,He-3) reaction were also compared with the shell-model calculations. The theoretical cross sections exceeded the data by a factor of about 1.8, which might indicate that the dipole excitations are "quenched". Uncertainties in the reaction calculations complicate that interpretation.

引用

页数：10

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