Level structure of170Er observed in the decay of the 2.76 min170Ho

Autor:	R. Katajanheimo, E. Hammarén, T. Tuurnala
Rok vydání:	1978
Předmět:	Physics Nuclear and High Energy Physics Angular momentum Isotope 010308 nuclear & particles physics Elementary particle General Medicine 01 natural sciences Spectral line Coincidence 0103 physical sciences Level structure Nuclear fusion Atomic physics 010306 general physics Ground state
Zdroj:	Zeitschrift f�r Physik A Atoms and Nuclei. 286:57-63
ISSN:	1434-601X 0340-2193
DOI:	10.1007/bf01434613
Popis:	TheΒ−-decay of the longer-lived170Ho isomer produced through the170Er(n, p)170Ho reaction has been investigated by using a versastile detector and coincidence equipment. The half-life andΒ−-decay energy were determined to beT1/2=2.76±0.05 min andQβ =3.85±0.15 MeV, respectively. In addition to the ground state band and some higher energy levels, the proposed level scheme of170Er contains 11 states between 1.0 and 1.6 MeV (6 new ones), which are connected mutually by previously unknown low-energy transitions. Spin and/or parity assignments based mainly on coincidence data and multipolarity determinations are suggested for most of these states. By using systematic considerations and the nuclear projection model calculations several bands withK≧2 can be assigned tentatively. As a side result the half-life of169Ho was determined to be 4.7 ±0.2 min.
Databáze:	OpenAIRE
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