Structure of {sup 23}F via {beta} decay of {sup 23}O
Abstract
The nuclear states in {sup 23}F have been investigated following the {beta} decay of {sup 23}O. The measurement of {sup 23}O was carried out at the National Superconducting Cyclotron Laboratory using fragments from the reaction of a {sup 48}Ca beam in a Be target. The half-life and total neutron emission probability were determined to be 97(8) ms and 7(2)%, respectively, for {sup 23}O {beta} decay. Ten {gamma}-ray decays in {sup 23}F and a single {gamma}-ray in {sup 22}F were observed to establish the {beta} decay scheme for {sup 23}O. Shell model calculations are in reasonable agreement with the measured {beta} branching and B(GT) values for the lowest energy state. The excitation energies of the first 1/2{sup +} and 3/2{sup +} states have been determined to be 2243(8) and 4066(16) keV, respectively, indicating a widening of the 5/2{sup +}-1/2{sup +} state gap in {sup 23}F. The decay scheme of the largest contaminant {sup 26}Ne in the experiment was established.
- Authors:
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)
- (United States)
- Publication Date:
- OSTI Identifier:
- 20991006
- Resource Type:
- Journal Article
- Resource Relation:
- Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevC.75.024305; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BEAMS; BETA DECAY; BRANCHING RATIO; CALCIUM 48; EXCITATION; FLUORINE 22; FLUORINE 23; GAMMA RADIATION; HALF-LIFE; KEV RANGE; NEON 26; NEUTRON EMISSION; OXYGEN 23; SHELL MODELS; SUPERCONDUCTING CYCLOTRONS
Citation Formats
Sumithrarachchi, C. S., Morrissey, D. J., Davies, D. A., Mantica, P. F., Stoker, J., Weerasiri, R. R., Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, Brown, B. A., Davies, A. D., Kwan, E., Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, Fancina, M., Portillo, M., and Shimbara, Y. Structure of {sup 23}F via {beta} decay of {sup 23}O. United States: N. p., 2007.
Web. doi:10.1103/PHYSREVC.75.024305.
Sumithrarachchi, C. S., Morrissey, D. J., Davies, D. A., Mantica, P. F., Stoker, J., Weerasiri, R. R., Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, Brown, B. A., Davies, A. D., Kwan, E., Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, Fancina, M., Portillo, M., & Shimbara, Y. Structure of {sup 23}F via {beta} decay of {sup 23}O. United States. doi:10.1103/PHYSREVC.75.024305.
Sumithrarachchi, C. S., Morrissey, D. J., Davies, D. A., Mantica, P. F., Stoker, J., Weerasiri, R. R., Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, Brown, B. A., Davies, A. D., Kwan, E., Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, Fancina, M., Portillo, M., and Shimbara, Y. Thu .
"Structure of {sup 23}F via {beta} decay of {sup 23}O". United States.
doi:10.1103/PHYSREVC.75.024305.
@article{osti_20991006,
title = {Structure of {sup 23}F via {beta} decay of {sup 23}O},
author = {Sumithrarachchi, C. S. and Morrissey, D. J. and Davies, D. A. and Mantica, P. F. and Stoker, J. and Weerasiri, R. R. and Department of Chemistry, Michigan State University, East Lansing, Michigan 48824 and Brown, B. A. and Davies, A. D. and Kwan, E. and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 and Fancina, M. and Portillo, M. and Shimbara, Y.},
abstractNote = {The nuclear states in {sup 23}F have been investigated following the {beta} decay of {sup 23}O. The measurement of {sup 23}O was carried out at the National Superconducting Cyclotron Laboratory using fragments from the reaction of a {sup 48}Ca beam in a Be target. The half-life and total neutron emission probability were determined to be 97(8) ms and 7(2)%, respectively, for {sup 23}O {beta} decay. Ten {gamma}-ray decays in {sup 23}F and a single {gamma}-ray in {sup 22}F were observed to establish the {beta} decay scheme for {sup 23}O. Shell model calculations are in reasonable agreement with the measured {beta} branching and B(GT) values for the lowest energy state. The excitation energies of the first 1/2{sup +} and 3/2{sup +} states have been determined to be 2243(8) and 4066(16) keV, respectively, indicating a widening of the 5/2{sup +}-1/2{sup +} state gap in {sup 23}F. The decay scheme of the largest contaminant {sup 26}Ne in the experiment was established.},
doi = {10.1103/PHYSREVC.75.024305},
journal = {Physical Review. C, Nuclear Physics},
number = 2,
volume = 75,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}
-
Transitional nuclei in the rare-earth region: Energy levels and structure of sup 130,132 Ce, sup 132,134 Nd, and sup 134 Pm, via. beta. decay of sup 130,132 Pr, sup 132,134 Pm, and sup 134 Sm
An investigation of low-lying energy levels of {sup 130,132}Ce, {sup 132,134}Nd, and {sup 134}Pm has been made via {beta} decay, especially of those levels in the {ital K}{sup {pi}}=2{sup +} gamma band in the even-even nuclei. The radioactive parent nuclei were produced by the {sup 92}Mo({sup 46}Ti,{ital xpyn}) and {sup 112}Sn({sup 28}Si,{ital xpyn}) reactions with bombarding energies of 170 to 240 MeV. An isotope separator enabled {ital A}=134 mass identification. Level schemes of these five nuclei were constructed from {gamma}-{gamma}-{ital t} coincidence data. The {beta}-decay half-lives of the parent nuclei, {sup 130}Pr, {sup 132}Pr, {sup 132}Pm, {sup 134}Pm, and {supmore » -
Charge multiplication via Auger decay of L vacancies in the production of highly charged Ar ions by collisions with 1-MeV/amu O/sup q//sup +/ and F/sup q//sup +/
Cross sections for the production of Ar recoil ions in collisions with 1-MeV/amu O/sup q//sup +/ and F/sup q//sup +/ (q = 2 to bare nuclei) were measured by the time-of-flight technique. The cross sections for the production, by pure ionization, of recoil ions having charges greater than 6 display an unexpected behavior as a function of q. They rise at low q, reach a maximum in the vicinity of q = 5--7, and then decrease at high q. Cross sections calculated using the independent-electron approximation rise continuously in this region and are lower than the experimental cross sections bymore »