Authors:
Haladhara Naik Bhabha Atomic Research Centre Radiochemistry Division Trombay, Mumbai 400085 India

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Guinyun Kim Kyungpook National University Department of Physics Daegu 202-701 Republic of Korea

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Ashok Goswami Bhabha Atomic Research Centre Radiochemistry Division Trombay, Mumbai 400085 India

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Sarbjit Singh Bhabha Atomic Research Centre Radiochemistry Division Trombay, Mumbai 400085 India

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Vijay Manchanda Bhabha Atomic Research Centre Radiochemistry Division Trombay, Mumbai 400085 India

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Devesh Raj Bhabha Atomic Research Centre Reactor Physics Design Division Trombay, Mumbai 400085 India

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Srinivasan Ganesan Bhabha Atomic Research Centre Reactor Physics Design Division Trombay, Mumbai 400085 India

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Young Oh Pohang University of Science and Technology Pohang Accelerator Laboratory Pohang 790-784 Republic of Korea

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Hee-Seock Lee Pohang University of Science and Technology Pohang Accelerator Laboratory Pohang 790-784 Republic of Korea

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Kyung Kim Kyungpook National University Department of Physics Daegu 202-701 Republic of Korea

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Man-Woo Lee Kyungpook National University Department of Physics Daegu 202-701 Republic of Korea

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Moo-Hyun Cho Pohang University of Science and Technology Pohang Accelerator Laboratory Pohang 790-784 Republic of Korea

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In Ko Pohang University of Science and Technology Pohang Accelerator Laboratory Pohang 790-784 Republic of Korea

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Won Namkung Pohang University of Science and Technology Pohang Accelerator Laboratory Pohang 790-784 Republic of Korea

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Abstract  

The mass–yield distributions of various fission products have been determined in the 50-, 60- and 70-MeV end point bremsstrahlung induced fission of natPb using off-line γ-ray spectrometric technique in the electron linac at Pohang Accelerator Laboratory, Korea. The mass–yield distributions are symmetric with average mass of 102.34, 102.25 and 102.03 and FWHM of 21, 22 and 23 mass unit, respectively. From the present data and literature data in the 50–85 MeV bremsstrahlung induced fission of 209Bi the following observations were obtained: (i) The average masses of the yield distributions in the 50–85 MeV bremsstrahlung induced fission of natPb and 209Bi are around 102.25 ± 0.25 and 103 ± 0.5, respectively. (ii) The FWHM of the mass–yield distributions increases from about 21 mass units at 50 MeV to 23 mass units at 70–85 MeV, which is explained from the point of increase in multi-chance fission probability with increasing excitation energy. (iii) Within the bremsstrahlung energy range of 50–85 MeV, the role of nuclear structure effect in the mass–yield distribution was observed in the photo-fission of 209Bi, whereas it was not seen in case of natPb. This may be due to the presence of so many isotopes in natPb unlike mono-isotopic 209Bi.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)