Investigation of the effect of resonant environment (Mössbauer screen) on the observed half-life of the 119m1Sn isomer (E = 23.8 keV, T 1/2 ∼ 18 ns)

Autor:	E. I. Malyutenkov, A. I. Egorov, S. E. Malyutenkova, Yu. E. Loginov, V. V. Martynov
Rok vydání:	2008
Předmět:	Materials science Physics and Astronomy (miscellaneous) Solid-state physics Mössbauer effect Analytical chemistry chemistry.chemical_element Half-life medicine.anatomical_structure chemistry Reference sample Excited state Mössbauer spectroscopy medicine Atomic physics Tin Nucleus
Zdroj:	JETP Letters. 87:4-6
ISSN:	1090-6487 0021-3640
DOI:	10.1134/s0021364008010025
Popis:	In order to analyze the effect of resonant environment on the γ decay of excited nuclei, the half-life of the 119m1Sn isomer (E = 23.8 keV, T1/2 ∼ 18 ns), which appears from the decay of the 119m2Sn state (E = 89 keV, T1/2 ∼ 293 d), has been measured by the e-γ coincidence method on samples consisting of the mixture of tin oxides containing the 119Sn stable nucleus and 119m2Sn radioactive nuclei with various values of the 119SnO2/119m2SnO2 ratio. For the samples, where this ratio is equal to 6.2 × 104, 1.2 × 106, 6.5 × 106, and 1.7 × 107, the half-life T1/2is equal to 18.69(2), 18.71(2), 18.91(5), and 19.43(4) ns, respectively. For the reference sample (a metal with a 119Sn/119m2Sn ratio of 1.5 × 105), the value T1/2 = 18.68(6) ns is obtained.
Databáze:	OpenAIRE
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