Determination of GTtransition Strengths in \(A=34\) Isobars Using Charge Exchange \((^3\text{He},t)\) Reaction
Nguyen Tuan Khai, Bui Duy Linh, Tran Duc Thiep, Y. Fujita, T Adachi, H. Fujita, A. Tamii
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 \(T_{z} = (NZ)/2\). 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 GamowTeller (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 isospinsymmetric 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 lowlying state.
Keywords
GamowTeller transition strength, chargeexchange reaction, isospin symmetry
DOI:
https://doi.org/10.15625/08683166/22/1/175
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