在E/A = 100 MeV的60Ni(13C,13N)60Co反应中观测到同位旋矢量四极共振。

Isovector quadrupole resonance observed in the 60Ni(13C,13N)60Co reaction at E/A=100 MeV.

作者信息

Ichihara T, Ishihara M, Ohnuma H, Niizeki T, Satou Y, Okamura H, Kubono S, Tanaka M H, Fuchi Y

机构信息

RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.

出版信息

Phys Rev Lett. 2002 Sep 30;89(14):142501. doi: 10.1103/PhysRevLett.89.142501. Epub 2002 Sep 11.

DOI:10.1103/PhysRevLett.89.142501

PMID:12366037

Abstract

The charge-exchange reaction 60Ni(13C,13N)60Co at E/A=100 MeV has been studied to locate isovector (deltaT=1) non-spin-flip (deltaS=0) giant resonances. Besides the giant dipole resonance at E(x)=8.7 MeV, another resonance has been observed at E(x)=20 MeV with a width of 9 MeV. Distorted-wave Born approximation analysis on the angular distribution clearly indicated the L=2 multipolarity, attributing the E(x)=20 MeV state to the giant isovector quadrupole resonance.

摘要

已对能量/核子（E/A）=100兆电子伏时的电荷交换反应60Ni(13C,13N)60Co进行了研究，以确定同位旋矢量（δT = 1）非自旋翻转（δS = 0）巨共振。除了在E(x)=8.7兆电子伏处的巨偶极共振外，还在E(x)=20兆电子伏处观测到另一个共振，其宽度为9兆电子伏。对角分布进行的扭曲波玻恩近似分析清楚地表明其多极性为L = 2，将E(x)=20兆电子伏的态归因于巨同位旋矢量四极共振。