Volume 121, Number 1, January 2018
|Number of page(s)||5|
|Published online||02 March 2018|
Precise measurement of energy of the first excited state of 115Sn (Eexc ≃ 497.3 keV)
Institute for Nuclear Research - 03028 Kyiv, Ukraine
Received: 19 October 2017
Accepted: 8 February 2018
Single beta decay of 115In to the first excited level of 115Sn () is known as β-decay with the lowest value. To determine the precisely, one has to measure very accurately the value. A sample of tin enriched in 115Sn to 50.7% was irradiated by a proton beam at the U-120 accelerator of INR, Kyiv. The 115Sb radioactive isotope, created in the 115Sn(p,n)115Sb reaction, decays with to 115Sn populating the 497 keV level with probability. The total statistics of counts collected in the 497 keV peak in a series of measurements, the exact description of the peak shape and the precisely known calibration points around the 497 keV peak allowed to obtain the value , which is the most precise to-date. This leads to the following value for the decay 115In → 115Sn*: .
PACS: 23.20.Lv – γ transitions and level energies / 25.40.Kv – Charge-exchange reactions / 27.60.+j – 90 ≤ A ≤ 149
© EPLA, 2018
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