Published December 2007 | Version v1
Journal article Metadata-only

In-beam gamma-ray spectroscopy of 190,197Po

Creators

  • 1. University of Liverpool, Department of Physics, Oliver Lodge Laboratory, Liverpool (United Kingdom)
  • 2. TRIUMF, Vancouver, BC (Canada)
  • 3. University of Jyvaeskylae, Department of Physics, Jyvaeskylae (Finland)
  • 4. Royal Institute of Technology, Department of Physics, Stockholm (Sweden)

Description

γ-ray transitions in the neutron-deficient nuclei 190,197Po have been identified using the JUROGAM Ge detector array coupled to the RITU gas-filled separator and the GREAT spectrometer. The yrast band of 190Po has been firmly established through γ - γ coincidences and extended up to a spin and parity of 14+. It displays similar behaviour to its isotones 186Hg and 188Pb above the 4+ level, thus confirming its prolate nature. In 197Po the band built upon the 13/2+ isomer has been extended up to a spin and parity of 33/2+, while the non-yrast band has been observed for the first time. The behaviour of 197Po is found to be similar to that of the nearby even-mass isotopes, which is consistent with the model in which the i13/2 neutron is weakly coupled to the states in the even-even core. (orig.)

Availability note (English)

Available from: http://dx.doi.org/10.1140/epja/i2007-10507-2

Additional details

Identifiers

DOI
10.1140/epja/i2007-10507-2;

Publishing Information

Journal Title
European Physical Journal. A
Journal Volume
34
Journal Issue
3
Journal Page Range
p. 275-281
ISSN
1434-6001

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
39023952
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
DE-EXCITATION; ENERGY SPECTRA; EXPERIMENTAL DATA; GAMMA CASCADES; GAMMA SPECTRA; HEAVY ION FUSION REACTIONS; HIGH SPIN STATES; MEV RANGE 100-1000; MOMENT OF INERTIA; NEUTRON-DEFICIENT ISOTOPES; NEUTRONS; PARITY; POLONIUM 190; POLONIUM 197; ROTATIONAL STATES; SAMARIUM 144 TARGET; SPIN; TITANIUM 49 REACTIONS; YRAST STATES
Descriptors DEC
ALPHA DECAY RADIOISOTOPES; ANGULAR MOMENTUM; BARYONS; BETA DECAY RADIOISOTOPES; DATA; ELECTRON CAPTURE RADIOISOTOPES; ELEMENTARY PARTICLES; ENERGY LEVELS; ENERGY RANGE; ENERGY-LEVEL TRANSITIONS; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; EXCITED STATES; FERMIONS; HADRONS; HEAVY ION REACTIONS; HEAVY NUCLEI; INFORMATION; ISOTOPES; MEV RANGE; MILLISECONDS LIVING RADIOISOTOPES; NUCLEAR CASCADES; NUCLEAR REACTIONS; NUCLEI; NUCLEONS; NUCLEOSYNTHESIS; NUMERICAL DATA; PARTICLE PROPERTIES; POLONIUM ISOTOPES; RADIOISOTOPES; SECONDS LIVING RADIOISOTOPES; SPECTRA; SYNTHESIS; TARGETS