Product yields for the photo-fission of Bi-209 with 2.5 GeV bremsstrahlung
SCIE
SCOPUS
- Title
- Product yields for the photo-fission of Bi-209 with 2.5 GeV bremsstrahlung
- Authors
- Naik, H; Singh, S; Reddy, AVR; Manch; a, VK; Kim, G; Kim, KS; Lee, MW; Ganesan, S; Raj, D; Lee, HS; Do Oh, Y; Cho, MH; Ko, IS; Namkung, W
- Date Issued
- 2009-06-01
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- The mass-yield distribution of fission products in the 2.5 GeV bremsstrahlung-induced fission of Bi-209 have been determined by using the recoil catcher and the off-line gamma-spectrometry technique in the high energy electron linac at the Pohang Accelerator Laboratory. The mass-yield determination involves the measurements of cumulative yields for 32 fission products and independent yields of 17 fission products in the photo-fission of Bi-209 nuclei. It was found that the mass-yield distribution of fission products in Bi-209 is symmetric with an average mass of 95 +/- 0.5 and a FWHM of 51 +/- 2.0 mass units. Present data at 2.5 GeV along with the literature data at 1 GeV, 700-600 MeV, and 85-28 MeV were interpreted from the point of increase of multi-chance fission and multi-nucleon emission probabilities with an increase in excitation energy. It was found that the average mass of the mass-yield distribution of the fission products decreases from 103 +/- 0.5 at 28-85 MeV to 95 +/- 0.5 at 2.5 GeV. On the other hand, the FWHM of the mass-yield distribution increases from 19 mass units at 28-40 MeV to 51 mass units at 2.5 GeV. It was also found that the nuclear structure effect observed at the photo-fission of Bi-209 with 28-85 MeV bremsstrahlung is washed out at higher energy. (C) 2009 Elsevier B.V. All rights reserved.
- Keywords
- Mass-yield distribution; 2.5 GeV Bremsstrahlung; Photo-fission of (209)Bi; Catcher foil; KINETIC-ENERGY DISTRIBUTIONS; PHOTOFISSION CROSS-SECTION; PARTICLE-INDUCED FISSION; NEUTRON-INDUCED FISSION; PHOTOEXCITATION MECHANISMS; INTERMEDIATE ENERGY; CHARGE-DISTRIBUTION; ALPHA-PARTICLES; DELTA-REGION; MASS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/108069
- DOI
- 10.1016/J.NIMB.2009.
- ISSN
- 0168-583X
- Article Type
- Article
- Citation
- NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, vol. 267, no. 11, page. 1891 - 1898, 2009-06-01
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