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Improved characteristics of the 22.5 keV (M1+E2) nuclear transition in (149)Sm
- 1.0365548 - ÚJF 2012 RIV DE eng J - Journal Article
Inoyatov, A. K. - Filosofov, D. V. - Gorozhankin, VM. - Kovalík, Alojz - Adam, Jiří - Perevoshchikov, L. L. - Ryšavý, Miloš
Improved characteristics of the 22.5 keV (M1+E2) nuclear transition in (149)Sm.
European Physical Journal A. Roč. 47, č. 5 (2011), 64/1-64/5. ISSN 1434-6001. E-ISSN 1434-601X
R&D Projects: GA MŠMT LC07050
Institutional research plan: CEZ:AV0Z10480505
Keywords : INTERNAL-CONVERSION COEFFICIENTS * DECAY
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 2.190, year: 2011
The gamma ray and conversion electron spectra of the 22.5 keV M1 + E2 nuclear transition depopulating the first excited level 5/2(-) in (149)Sm were investigated in detail. A substantially improved value of 22500.2 +/- 0.8 eV for the transition energy was determined that opens a possibility to establish an electron energy standard for the keV region based on the conversion electron lines of this transition. The E2 admixture parameter vertical bar delta(E2/M1)vertical bar = 0.0784 +/- 0.0009 and the nuclear structure parameter lambda = -2 +/- 10 were derived. The vertical bar delta(E2/M1)vertical bar and lambda parameters were also obtained for all available experimental data and their mutual combination.
Permanent Link: http://hdl.handle.net/11104/0200769
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