Vol. 22 No. 1 (2012)
Papers

Determination of GT-transition Strengths in \(A=34\) Isobars Using Charge Exchange \((^3\text{He},t)\) Reaction

Nguyen Tuan Khai
Institute for Nuclear Science and Technology
Bui Duy Linh
Institute for Nuclear Science and Technology
Tran Duc Thiep
Institute of Physics, VAST
Y. Fujita
Research Center for Nuclear Physics, Osaka University, Ibaraki 567-0047, Japan
T Adachi
Research Center for Nuclear Physics, Osaka University, Ibaraki 567-0047, Japan
H. Fujita
Research Center for Nuclear Physics, Osaka University, Ibaraki 567-0047, Japan
A. Tamii
Research Center for Nuclear Physics, Osaka University, Ibaraki 567-0047, Japan

Published 07-05-2012

Keywords

  • Gamow-Teller transition strength,
  • charge-exchange reaction,
  • isospin symmetry

How to Cite

Khai, N. T., Linh, B. D., Thiep, T. D., Fujita, Y., Adachi, T., Fujita, H., & Tamii, A. (2012). Determination of GT-transition Strengths in \(A=34\) Isobars Using Charge Exchange \((^3\text{He},t)\) Reaction. Communications in Physics, 22(1), 91–96. https://doi.org/10.15625/0868-3166/22/1/175

Abstract

Under the assumption that isospin \(T\) is a good quantum number, mirror transitions \(T_{z }= +1 \to  0\) and \(T_{z }= -1  \to  0\) were studied in \(A = 34\) isobars, where \(T_{z}\) is \(z\) component of iospin \(T\) and is defined by \(T_{z} = (N-Z)/2\). With a high energy resolution of 35 keV in \(^{34}\)S\((^{3}He,t)^{34}\)Cl reaction measurement at \(0^{\circ}\) scattering angle and at an incident energy of 140 MeV/nucleon, strengths of Fermi and Gamow-Teller (GT) transitions from the \(J^{\pi } = 0^{ + }\), \(T_{z }= +1\) ground state of \(^{34}\)S to the \(J^{\pi } = 1^{+ }\), \(T_{z }= 0\) excited states in \(^{34}\)Cl were determined up to excitation energy \((E_{x})\) of \(7.08\) MeV. The corresponding isospin-symmetric transitions connecting \(T_{z }= -1\) and \(T_{z }= 0\) states can be studied in the \(^{34}\)Ar \(\beta ^{ + }\) decay. The strengths of the \((GT)_{\pm }\) transitions were compared up to the excitation energy of 3.1 MeV. A good agreement was observed for two strong transitions to \(2.580\) MeV and \(3.129\) MeV states, while a disagreement about \(45\text{%}\) was observed for a weaker transition to \(0.666\) MeV low-lying state.

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