Identification of the slow E3 transition {sup 136}Cs{sup m{yields}136}Cs with conversion electrons

Journal Article · Fri Jul 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.84.014329· OSTI ID:21596575

Wimmer, K ^[1]; Koester, U ^[2]; Hoff, P ^[3]; Kroell, Th ^[4]; Kruecken, R ^[4]; Lutter, R; Morgan, Th; Schwerdtfeger, W; Thirolf, P G ^[1]; Mach, H ^[5]; Sarkar, S ^[6]; Sarkar, M Saha ^[7]; Srivastava, P C ^[8]; Van Isacker, P ^[8]

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1. Fakultaet fuer Physik, Ludwig-Maximilians-Universitaet Muenchen, D-85748 Garching (Germany)
2. Institut Laue Langevin, F-38042 Grenoble Cedex 9 (France)
3. Department of Chemistry, University of Oslo, N-0315 Oslo (Norway)
4. Physik Department E12, Technische Universitaet Muenchen, D-85748 Garching (Germany)
5. Department of Nuclear and Particle Physics, Uppsala University, S-75121 Uppsala (Sweden)
6. Department of Physics, Bengal Engineering and Science University, Shibpur, Howrah 711103 (India)
7. Nuclear and Atomic Physics Division, Saha Institute of Nuclear Physics, Kolkata 700064 (India)
8. Grand Accelerateur National d'Ions Lourds, CEA/DSM-CNRS/IN2P3, B.P. 55027, F-14076 Caen Cedex 5 (France)

We performed at ISOLDE the spectroscopy of the decay of the 8{sup -} isomer in {sup 136}Cs by {gamma} and conversion-electron detection. For the first time the excitation energy of the isomer and the multipolarity of its decay have been measured. The half-life of the isomeric state was remeasured to T{sub 1/2}=17.5(2) s. This isomer decays via a very slow 518-keV E3 transition to the ground state. In addition to this, a much weaker decay branch via a 413-keV M4 and a subsequent 105-keV E2 transition has been found. Thus we have found a new level at 105 keV with spin 4{sup +} between the isomeric and the ground state. The results are discussed in comparison to shell-model calculations.

• OSTI ID: 21596575
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 84, Issue 1; Other Information: DOI: 10.1103/PhysRevC.84.014329; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CESIUM 136
COMPARATIVE EVALUATIONS
CONVERSION
E2-TRANSITIONS
E3-TRANSITIONS
ELECTRON DETECTION
ELECTRONS
EXCITATION
GROUND STATES
HALF-LIFE
ISOMERS
KEV RANGE 100-1000
MULTIPOLARITY
SHELL MODELS
SPECTROSCOPY
SPIN
ANGULAR MOMENTUM
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CESIUM ISOTOPES
CHARGED PARTICLE DETECTION
DAYS LIVING RADIOISOTOPES
DETECTION
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVALUATION
FERMIONS
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KEV RANGE
LEPTONS
MATHEMATICAL MODELS
MULTIPOLE TRANSITIONS
NUCLEAR MODELS
NUCLEI
ODD-ODD NUCLEI
PARTICLE PROPERTIES
RADIATION DETECTION
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES