Identification of the ${13/2^+}$ isomer in $\chem{^{199}At}$

M. Lach; P. Bednarczyk; P.T. Greenlees; K. Helariutta; P. Jones; R. Julin; S. Juutinen; H. Kankaanpää; H. Kettunen; P. Kuusiniemi; M. Leino; W. Męczyński; M. Muikku; P. Nieminen; P. Rahkila; J. Styczeń; J. Uusitalo

doi:doi:10.1007/s100500070014

EPJ

a
b
c
d
e
ap
st
h
plus
ds
pv
ti
qt
am
n

2024 Impact factor 2.8

Hadrons and Nuclei

Eur. Phys. J. A 9, 307-308

Short note

Identification of the 13/2⁺ isomer in $\ensuremath{\mathsf{^{199}At}}$

M. Lach¹ - P. Bednarczyk¹ - P.T. Greenlees² - K. Helariutta² - P. Jones² - R. Julin² - S. Juutinen² - H. Kankaanpää² - H. Kettunen² - P. Kuusiniemi² - M. Leino² - W. Meczynski¹ - M. Muikku² - P. Nieminen² - P. Rahkila² - J. Styczen¹ - J. Uusitalo²

¹ The Niewodniczanski Institute of Nuclear Physics, Kraków, Poland
² Department of Physics, University of Jyväskylä, Jyväskylä, Finland

Received: 19 September 2000 / Revised version: 19 October 2000
Communicated by J Äystö

Abstract
The 13/2⁺ isomeric state in the $\ensuremath{\mathsf{^{199}At}}$ nucleus has been identified at an excitation energy of 573 keV and its half-life measured to be 580(130) ns using the recoil-decay tagging technique.

PACS
21.10.Tg Lifetimes - 23.20.Lv Gamma transitions and level energies - 27.80.+w $190\leq A\leq 219$