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Title: First application of the Oslo method in inverse kinematics

Abstract

The γ-ray strength function (γSF) and nuclear level density (NLD) have been extracted for the first time from inverse kinematic reactions with the Oslo method. This novel technique allows measurements of these properties across a wide range of previously inaccessible nuclei. Proton–γ coincidence events from the d(86Kr, pγ)87Kr reaction were measured at iThemba LABS and the γSF and NLD in 87Kr was obtained. The low-energy region of the γSF is compared to shell-model calculations, which suggest this region to be dominated by M1 strength. The γSF and NLD are used as input parameters to Hauser–Feshbach calculations to constrain (n,γ) cross sections of nuclei using the TALYS reaction code. These results are compared to 86Kr(n,γ) data from direct measurements.

Authors:
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Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); Research Council of Norway; National Research Foundation of South Africa; European Research Council (ERC); ChETEC Cost Action; International Atomic Energy Agency (IAEA)
OSTI Identifier:
1619342
Alternate Identifier(s):
OSTI ID: 1657679
Report Number(s):
LLNL-JRNL-790841
Journal ID: ISSN 1434-6001; 68; PII: 70
Grant/Contract Number:  
AC52-07NA27344; 222287; 262952; 263030; 240104; 118846; 637686; CA16117; 20454; 20447
Resource Type:
Published Article
Journal Name:
European Physical Journal. A
Additional Journal Information:
Journal Name: European Physical Journal. A Journal Volume: 56 Journal Issue: 2; Journal ID: ISSN 1434-6001
Publisher:
Springer
Country of Publication:
Germany
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Ingeberg, V. W., Siem, S., Wiedeking, M., Sieja, K., Bleuel, D. L., Brits, C. P., Bucher, T. D., Dinoko, T. S., Easton, J. L., Görgen, A., Guttormsen, M., Jones, P., Kheswa, B. V., Khumalo, N. A., Larsen, A. C., Lawrie, E. A., Lawrie, J. J., Majola, S. N. T., Malatji, K. L., Makhathini, L., Maqabuka, B., Negi, D., Noncolela, S. P., Papka, P., Sahin, E., Schwengner, R., Tveten, G. M., Zeiser, F., and Zikhali, B. R. First application of the Oslo method in inverse kinematics. Germany: N. p., 2020. Web. https://doi.org/10.1140/epja/s10050-020-00070-7.
Ingeberg, V. W., Siem, S., Wiedeking, M., Sieja, K., Bleuel, D. L., Brits, C. P., Bucher, T. D., Dinoko, T. S., Easton, J. L., Görgen, A., Guttormsen, M., Jones, P., Kheswa, B. V., Khumalo, N. A., Larsen, A. C., Lawrie, E. A., Lawrie, J. J., Majola, S. N. T., Malatji, K. L., Makhathini, L., Maqabuka, B., Negi, D., Noncolela, S. P., Papka, P., Sahin, E., Schwengner, R., Tveten, G. M., Zeiser, F., & Zikhali, B. R. First application of the Oslo method in inverse kinematics. Germany. https://doi.org/10.1140/epja/s10050-020-00070-7
Ingeberg, V. W., Siem, S., Wiedeking, M., Sieja, K., Bleuel, D. L., Brits, C. P., Bucher, T. D., Dinoko, T. S., Easton, J. L., Görgen, A., Guttormsen, M., Jones, P., Kheswa, B. V., Khumalo, N. A., Larsen, A. C., Lawrie, E. A., Lawrie, J. J., Majola, S. N. T., Malatji, K. L., Makhathini, L., Maqabuka, B., Negi, D., Noncolela, S. P., Papka, P., Sahin, E., Schwengner, R., Tveten, G. M., Zeiser, F., and Zikhali, B. R. Thu . "First application of the Oslo method in inverse kinematics". Germany. https://doi.org/10.1140/epja/s10050-020-00070-7.
@article{osti_1619342,
title = {First application of the Oslo method in inverse kinematics},
author = {Ingeberg, V. W. and Siem, S. and Wiedeking, M. and Sieja, K. and Bleuel, D. L. and Brits, C. P. and Bucher, T. D. and Dinoko, T. S. and Easton, J. L. and Görgen, A. and Guttormsen, M. and Jones, P. and Kheswa, B. V. and Khumalo, N. A. and Larsen, A. C. and Lawrie, E. A. and Lawrie, J. J. and Majola, S. N. T. and Malatji, K. L. and Makhathini, L. and Maqabuka, B. and Negi, D. and Noncolela, S. P. and Papka, P. and Sahin, E. and Schwengner, R. and Tveten, G. M. and Zeiser, F. and Zikhali, B. R.},
abstractNote = {The γ-ray strength function (γSF) and nuclear level density (NLD) have been extracted for the first time from inverse kinematic reactions with the Oslo method. This novel technique allows measurements of these properties across a wide range of previously inaccessible nuclei. Proton–γ coincidence events from the d(86Kr, pγ)87Kr reaction were measured at iThemba LABS and the γSF and NLD in 87Kr was obtained. The low-energy region of the γSF is compared to shell-model calculations, which suggest this region to be dominated by M1 strength. The γSF and NLD are used as input parameters to Hauser–Feshbach calculations to constrain (n,γ) cross sections of nuclei using the TALYS reaction code. These results are compared to 86Kr(n,γ) data from direct measurements.},
doi = {10.1140/epja/s10050-020-00070-7},
journal = {European Physical Journal. A},
number = 2,
volume = 56,
place = {Germany},
year = {2020},
month = {2}
}

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