Energy levels of ${}^{127, 129, 131}{Sn}$ populated in the $β^{-}$ decay of ${}^{127, 129, 131}{In}$

The decay of 0.27 s

{}^{131}{In}

to levels in the single hole nucleus

{}^{131}{Sn}

have been studied using an on-line isotope separator. The

s_{\frac{1}{2}}

and

g_{\frac{7}{2}}

levels are found at 332.8 and 2433 keV excitation, respectively. The

Q_{β^{-}}

{}^{131}{In}

has been determined to be 8.82±0.20 MeV. To complete the series of heavy odd-mass isotopes of Sn, levels in the

{}^{127, 129}{Sn}

nuclei, which are populated in the decay of

{}^{127, 129}{In}

also have been studied. Decay schemes are proposed for the decay of two

{}^{127}{In}

isomers of half-lives 1.15±0.05 s and 3.7±0.1 s and for the decay of two

{}^{129}{In}

isomers of half-lives 0.59±0.03 s and 1.20±0.05 s. Low lying negative parity states of three quasiparticle character have been observed in

{}^{127, 129}{Sn}

where

μ s

isomers due to the low energy

h_{\frac{11}{2}}

orbit are also suggested.

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Energy levels ofSn127,129,131populated in theβ−decay ofIn127,129,131