Identification of 88Se and search for delayed neutron emission from 87Se and 88Se

P. del Marmol; D. C. Perricos

doi:10.1016/0022-1902(70)80052-5

Identification of ⁸⁸Se and search for delayed neutron emission from ⁸⁷Se and ⁸⁸Se

P. del Marmol, D. C. Perricos

Research output › peer-review

Abstract

⁸⁷Se and ⁸⁸Se are separated at short time intervals from ²³⁵U irradiated with thermal neutrons. Their half-lives were measured through the neutron activities of their bromine daughters as 5·9 ± 0·2 sec for ⁸⁷Se and 1·3 ± 0·3 sec for ⁸⁸Se fission yield was 0·65 ± 0·13 per cent. From a delayed neutron activity consistent with the ⁸⁷Se half-life and in constant ratio with the ⁸⁷Br activity, a P_n value of 0·23 ± 0·07 per cent was evaluated for ⁸⁷Se. Evidence was not conclusive as regards delayed neutron emission from ⁸⁸Se, for which an upper limit of P_n ≤ 1 per cent as estimated.

Original language	English
Pages (from-to)	705-712
Number of pages	8
Journal	Journal of Inorganic and Nuclear Chemistry
Volume	32
Issue number	3
DOIs	https://doi.org/10.1016/0022-1902(70)80052-5
State	Published - Mar 1970

Funding

Acknowledgements-The authors wish to thank Mr. H. Van Tigchelt for excellent and exhaustive work on the chemical separations, MM. L. Vansteelandt and E. Mies and their groups for designing and mounting the rabbit system and the electronic equipment, the BR1 reactor team for providing ample irradiation facilities, Miss H. Depuydt and Mr. P. Jansen for programming and handling the curve decompositions for the computer, Dr. M. N6ve de M6vergnies for valuable encouragement and criticism and Prof. G. Herrmann for communicating the results of his group before publication. Financial support and a fellowship grant (D.P.) from the International Atomic Energy Agency are gratefully acknowledged.

Funders	Funder number
International Atomic Energy Agency (IAEA)

Access to Document

10.1016/0022-1902(70)80052-5

Cite this

@article{4a2a1c4b458641f6b9028b35dff5d271,

title = "Identification of 88Se and search for delayed neutron emission from 87Se and 88Se",

abstract = "87Se and 88Se are separated at short time intervals from 235U irradiated with thermal neutrons. Their half-lives were measured through the neutron activities of their bromine daughters as 5·9 ± 0·2 sec for 87Se and 1·3 ± 0·3 sec for 88Se fission yield was 0·65 ± 0·13 per cent. From a delayed neutron activity consistent with the 87Se half-life and in constant ratio with the 87Br activity, a Pn value of 0·23 ± 0·07 per cent was evaluated for 87Se. Evidence was not conclusive as regards delayed neutron emission from 88Se, for which an upper limit of Pn ≤ 1 per cent as estimated.",

author = "{del Marmol}, P. and Perricos, {D. C.}",

year = "1970",

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doi = "10.1016/0022-1902(70)80052-5",

language = "English",

volume = "32",

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journal = "Journal of Inorganic and Nuclear Chemistry",

issn = "0022-1902",

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TY - JOUR

T1 - Identification of 88Se and search for delayed neutron emission from 87Se and 88Se

AU - del Marmol, P.

AU - Perricos, D. C.

PY - 1970/3

Y1 - 1970/3

N2 - 87Se and 88Se are separated at short time intervals from 235U irradiated with thermal neutrons. Their half-lives were measured through the neutron activities of their bromine daughters as 5·9 ± 0·2 sec for 87Se and 1·3 ± 0·3 sec for 88Se fission yield was 0·65 ± 0·13 per cent. From a delayed neutron activity consistent with the 87Se half-life and in constant ratio with the 87Br activity, a Pn value of 0·23 ± 0·07 per cent was evaluated for 87Se. Evidence was not conclusive as regards delayed neutron emission from 88Se, for which an upper limit of Pn ≤ 1 per cent as estimated.

AB - 87Se and 88Se are separated at short time intervals from 235U irradiated with thermal neutrons. Their half-lives were measured through the neutron activities of their bromine daughters as 5·9 ± 0·2 sec for 87Se and 1·3 ± 0·3 sec for 88Se fission yield was 0·65 ± 0·13 per cent. From a delayed neutron activity consistent with the 87Se half-life and in constant ratio with the 87Br activity, a Pn value of 0·23 ± 0·07 per cent was evaluated for 87Se. Evidence was not conclusive as regards delayed neutron emission from 88Se, for which an upper limit of Pn ≤ 1 per cent as estimated.

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