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Title: {alpha} decay of the new isotope {sup 206}Ac

Abstract

The new neutron-deficient nuclide {sup 206}Ac was produced by bombarding a {sup 175}Lu target with 5.5 MeV/nucleon {sup 36}Ar ions. The evaporation residues were separated in flight by a gas-filled separator and subsequently identified by the {alpha}-{alpha} position and time correlation method. {sup 206}Ac was found to have two {alpha} particle emitting isomeric levels with half-lives of (22{sub {minus}5}{sup +9}) ms and (33{sub {minus}9}{sup +22}) ms, and with {alpha} particle energies of (7790{plus_minus}30) keV and (7750{plus_minus}20) keV, respectively. The former isomer is tentatively assigned to a J{sup {pi}}=3{sup +} level and the latter to a J{sup {pi}}=10{sup {minus}} level, both of which are also seen in the daughter and granddaughter nuclides {sup 202}Fr and {sup 198}At. Improved values of (27{sub {minus}6}{sup +11}) ms and (7693{plus_minus}25) keV for the half-life and {alpha} particle energy of {sup 207}Ac are also reported. {copyright} {ital 1998} {ital The American Physical Society}

Authors:
 [1]; ; ; ; ; ; ; ;  [2]; ; ;  [3]
  1. Department of Physics, University of Helsinki, FIN-00014 Helsinki (Finland)
  2. Department of Physics, University of Jyvaeskylae, P.O. Box 35, FIN-40351 Jyvaeskylae (Finland)
  3. Department of Physics, University of Liverpool, Liverpool L69 7ZE (United Kingdom)
Publication Date:
OSTI Identifier:
566033
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review, C; Journal Volume: 57; Journal Issue: 1; Other Information: PBD: Jan 1998
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; ACTINIUM ISOTOPES; ALPHA DECAY; NEUTRON-DEFICIENT ISOTOPES; LUTETIUM 175 TARGET; ARGON 36 REACTIONS; EVAPORATION MODEL; ISOMERS; HALF-LIFE; ENERGY LEVELS; FRANCIUM 202; ASTATINE 198; PARTICLE PRODUCTION

Citation Formats

Eskola, K., Kuusiniemi, P., Leino, M., Cocks, J.F., Enqvist, T., Hurskanen, S., Kettunen, H., Trzaska, W.H., Uusitalo, J., Allatt, R.G., Greenlees, P.T., and Page, R.D.. {alpha} decay of the new isotope {sup 206}Ac. United States: N. p., 1998. Web. doi:10.1103/PhysRevC.57.417.
Eskola, K., Kuusiniemi, P., Leino, M., Cocks, J.F., Enqvist, T., Hurskanen, S., Kettunen, H., Trzaska, W.H., Uusitalo, J., Allatt, R.G., Greenlees, P.T., & Page, R.D.. {alpha} decay of the new isotope {sup 206}Ac. United States. doi:10.1103/PhysRevC.57.417.
Eskola, K., Kuusiniemi, P., Leino, M., Cocks, J.F., Enqvist, T., Hurskanen, S., Kettunen, H., Trzaska, W.H., Uusitalo, J., Allatt, R.G., Greenlees, P.T., and Page, R.D.. Thu . "{alpha} decay of the new isotope {sup 206}Ac". United States. doi:10.1103/PhysRevC.57.417.
@article{osti_566033,
title = {{alpha} decay of the new isotope {sup 206}Ac},
author = {Eskola, K. and Kuusiniemi, P. and Leino, M. and Cocks, J.F. and Enqvist, T. and Hurskanen, S. and Kettunen, H. and Trzaska, W.H. and Uusitalo, J. and Allatt, R.G. and Greenlees, P.T. and Page, R.D.},
abstractNote = {The new neutron-deficient nuclide {sup 206}Ac was produced by bombarding a {sup 175}Lu target with 5.5 MeV/nucleon {sup 36}Ar ions. The evaporation residues were separated in flight by a gas-filled separator and subsequently identified by the {alpha}-{alpha} position and time correlation method. {sup 206}Ac was found to have two {alpha} particle emitting isomeric levels with half-lives of (22{sub {minus}5}{sup +9}) ms and (33{sub {minus}9}{sup +22}) ms, and with {alpha} particle energies of (7790{plus_minus}30) keV and (7750{plus_minus}20) keV, respectively. The former isomer is tentatively assigned to a J{sup {pi}}=3{sup +} level and the latter to a J{sup {pi}}=10{sup {minus}} level, both of which are also seen in the daughter and granddaughter nuclides {sup 202}Fr and {sup 198}At. Improved values of (27{sub {minus}6}{sup +11}) ms and (7693{plus_minus}25) keV for the half-life and {alpha} particle energy of {sup 207}Ac are also reported. {copyright} {ital 1998} {ital The American Physical Society}},
doi = {10.1103/PhysRevC.57.417},
journal = {Physical Review, C},
number = 1,
volume = 57,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1998},
month = {Thu Jan 01 00:00:00 EST 1998}
}