Behavior of intruder based states in light Bi and Tl isotopes: The study of {sup 187}Bi {alpha} decay

Journal Article · Sat Feb 01 04:00:00 EST 1997 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.52709· OSTI ID:579985

Batchelder, J C; Zganjar, E F ^[1]; Toth, K S ^[2]; Bingham, C R; Wauters, J ^[3]; Davids, C N; Seweryniak, D S ^[4]; Irvine, R J ^[5]; Walters, W B; Conticchio, L F ^[6]; Brown, L T ^[7]

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1. Louisiana State University, Baton Rouge, Louisiana 70803 (United States)
2. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
3. University of Tennessee, Knoxville, Tennessee 37996 (United States)
4. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
5. University of Edinburgh, Edinburgh, EH93JZ (United Kingdom)
6. University of Maryland, College Park, Maryland 20742 (United States)
7. Vanderbilt University, Nashville, Tennessee 37235 (United States)

Intruder state excitation energies in odd-mass nuclei just outside a closed proton shell plotted versus neutron number generally exhibit parabola-shaped curves with minima near neutron mid-shells. The Bi isotopes, however, do not seem to follow this trend. Recent experiments performed at Argonne National Laboratory have identified the previously unobserved {sup 187}Bi ground state (h{sub 9/2}) to {sup 183}Tl ground state s{sub 1/2} {alpha} transition. Its energy when combined with those of two earlier known transitions, namely {sup 187}Bi(h{sub 9/2}){r_arrow}{sup 183m}Tl(h{sub 9/2}) and {sup 187m}Bi(s{sub 1/2}){r_arrow}{sup 183}Tl(s{sub 1/2}), establishes the excitation energies of the {sup 183m}Tl and {sup 187m}Bi to be 620(20) keV and 110(20) keV, respectively. This value for {sup 187m}Bi is 80 keV lower than the excitation energy of the same intruder level in {sup 189}Bi. Implications of this result with respect to intruder-state systematics are discussed. {copyright} {ital 1997 American Institute of Physics.}

• Research Organization: Oak Ridge National Laboratory
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-84OR21400; AC05-96OR22464; FG05-84ER40159; FG05-87ER40361; FG05-88ER40418; W-31109-ENG-38
• OSTI ID: 579985
• Report Number(s): CONF-961110--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 392; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ALPHA DECAY
BISMUTH ISOTOPES
ENERGY LEVELS
HALF-LIFE
HEAVY ION FUSION REACTIONS
LINE WIDTHS
MEV RANGE 100-1000
MOLYBDENUM 92 REACTIONS
MOLYBDENUM 97 TARGET
NEUTRONS
PROTONS