Investigation of short-lived PT and PB {alpha} emitters near the proton drip line
- University of Tennessee, Knoxville, Tennessee 37996 (United States)
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- Louisiana State University, Baton Rouge, Louisiana 70803 (United States)
- Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Vanderbilt University, Nashville, Tennessee 37235 (United States)
- Oregon State University, Corvallis, Oregon 97331 (United States)
- University of Maryland, College Park, Maryland 20742 (United States)
- Edinburgh University, Edinburgh, EH93JZ (United Kingdom)
In a series of experiments at the Argonne ATLAS Accelerator Facility, several {alpha} emitters near the proton drip line were produced with fusion evaporation reactions, separated from the beam and dispersed in M/Q with a recoil mass spectrometer, and implanted and studied in a double-sided silicon strip detector. In {sup 78}Kr bombardments of {sup 92}Mo and {sup 96}Ru, the new isotopes {sup 166}Pt and {sup 167}Pt were identified {ital via} their {alpha}-decay properties and more accurate half-lives were measured for {sup 168}Pt and {sup 170}Pt. The light isotopes of lead, {sup 180}Pb, {sup 182}Pb, and {sup 184}Pb were produced in Mo bombardments of Zr target nuclei. The {alpha}-decay energies and half-lives of the new isotopes are as follows: (1) {sup 166}Pt, E{sub {alpha}}=7110(15)keV, T{sub 1/2}=0.3(1)ms; and (2) {sup 167}Pt, E{sub {alpha}}=6988(10)keV, T{sub 1/2}=0.7(2)ms. Also, the half-life of {sup 168}Pt, which was previously unknown, was determined to be 2.0(4) ms and that of {sup 170}Pt was observed to be 14.7(5) ms. The tentative {alpha}-decay energies and half-lives of the even Pb isotopes are: (1) {sup 184}Pb, E{sub {alpha}}=6625(10)keV, T{sub 1/2}=500(25)ms; (2) {sup 182}Pb, E{sub {alpha}}=6895(10)keV, T{sub 1/2}=62(5)ms; and (3) {sup 180}Pb, E{sub {alpha}}=7250(15)keV, T{sub 1/2}=5.8{sup +2.8}{sub {minus}1.4} ms. The {alpha}-decay rates for these Pt and Pb nuclides are compared with earlier measurements and systematic trends of the reduced widths with neutron number are discussed. {copyright} {ital 1997 American Institute of Physics.}
- Research Organization:
- Oak Ridge National Laboratory
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-96OR22464; FG02-96ER40983; FG05-84ER40159; FG05-88ER40418; FG02-88ER40407; W-31109-ENG-38
- OSTI ID:
- 664611
- Report Number(s):
- CONF-961110--
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 392; ISSN 0094-243X; ISSN APCPCS
- Country of Publication:
- United States
- Language:
- English
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