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Spontaneous Fission of Light Californium Isotopes Produced in the {sup 206},{sup 207},{sup 208} Pb + {sup 34},{sup 36} S Reactions; New Nuclide {sup 238} Cf

Technical Report:

Abstract

In bombardments of {sup 206} Pb, {sup 207} Pb, {sup 208} Pb with {sup 34} S and {sup 206} Pb with {sup 36} S, we identified a new spontaneously fissioning isotope {sup 238} Cf with T{sub sf} {approx} T{sub 1/2} = 21 {+-} ms and obtained evidence of the production of a new isotope {sup 237} Cf with T{sub 1/2} = 2,1 {+-} 0,3 s. We measured spontaneous fission branches for {sup 242} Cf and {sup 240} Cf to be b{sub sf} {<=} 1,4 x 10{sup -4} and b{sub sf} {approx} 2 x 10{sup -2}, respectively. For {sup 237} Cf, we estimated b{sub sf} to be {approx} 10{sup -1}. The measured production cross sections of {sup 238} Cf in the {sup 206},{sup 207},{sup 208} Pb + {sup 34} S reactions are in the range of 0,3 to 1,1 nb. We probed also the influence of the neutron excess in the N = 20 projectile {sup 36} S on cross sections of fusion-evaporation fusion-evaporation reactions occurring on lead targets. 19 refs., 3 figs., 2 tabs.
Publication Date:
Dec 31, 1994
Product Type:
Technical Report
Report Number:
JINR-E-7-94-315
Reference Number:
SCA: 663450; 663470; PA: AIX-26:013300; EDB-95:032653; SN: 95001325357
Resource Relation:
Other Information: DN: Submitted to Nuclear Physics. A.; PBD: 1994
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CALIFORNIUM 238; SPONTANEOUS FISSION; LEAD 206 TARGET; SULFUR 34 REACTIONS; SULFUR 36 REACTIONS; LEAD 207 TARGET; LEAD 208 TARGET; BRANCHING RATIO; CALIFORNIUM 240; CALIFORNIUM 242; CROSS SECTIONS; EXPERIMENTAL DATA; HALF-LIFE; NEUTRON-DEFICIENT ISOTOPES; SPONTANEOUS FISSION RADIOISOTOPES; STABILITY; 663450; 663470; HEAVY-ION-INDUCED REACTIONS AND SCATTERING; FISSION
OSTI ID:
10112769
Research Organizations:
Joint Inst. for Nuclear Research, Dubna (Russian Federation). Lab. of Nuclear Reactions
Country of Origin:
JINR
Language:
English
Other Identifying Numbers:
Other: ON: DE95614046; TRN: XJ9406597013300
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
INIS
Size:
12 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Lazarev, Yu A, Shirokovskij, I V, Utenkov, V K, Tret`yakova, S P, and Kutner, V B. Spontaneous Fission of Light Californium Isotopes Produced in the {sup 206},{sup 207},{sup 208} Pb + {sup 34},{sup 36} S Reactions; New Nuclide {sup 238} Cf. JINR: N. p., 1994. Web.
Lazarev, Yu A, Shirokovskij, I V, Utenkov, V K, Tret`yakova, S P, & Kutner, V B. Spontaneous Fission of Light Californium Isotopes Produced in the {sup 206},{sup 207},{sup 208} Pb + {sup 34},{sup 36} S Reactions; New Nuclide {sup 238} Cf. JINR.
Lazarev, Yu A, Shirokovskij, I V, Utenkov, V K, Tret`yakova, S P, and Kutner, V B. 1994. "Spontaneous Fission of Light Californium Isotopes Produced in the {sup 206},{sup 207},{sup 208} Pb + {sup 34},{sup 36} S Reactions; New Nuclide {sup 238} Cf." JINR.
@misc{etde_10112769,
title = {Spontaneous Fission of Light Californium Isotopes Produced in the {sup 206},{sup 207},{sup 208} Pb + {sup 34},{sup 36} S Reactions; New Nuclide {sup 238} Cf}
author = {Lazarev, Yu A, Shirokovskij, I V, Utenkov, V K, Tret`yakova, S P, and Kutner, V B}
abstractNote = {In bombardments of {sup 206} Pb, {sup 207} Pb, {sup 208} Pb with {sup 34} S and {sup 206} Pb with {sup 36} S, we identified a new spontaneously fissioning isotope {sup 238} Cf with T{sub sf} {approx} T{sub 1/2} = 21 {+-} ms and obtained evidence of the production of a new isotope {sup 237} Cf with T{sub 1/2} = 2,1 {+-} 0,3 s. We measured spontaneous fission branches for {sup 242} Cf and {sup 240} Cf to be b{sub sf} {<=} 1,4 x 10{sup -4} and b{sub sf} {approx} 2 x 10{sup -2}, respectively. For {sup 237} Cf, we estimated b{sub sf} to be {approx} 10{sup -1}. The measured production cross sections of {sup 238} Cf in the {sup 206},{sup 207},{sup 208} Pb + {sup 34} S reactions are in the range of 0,3 to 1,1 nb. We probed also the influence of the neutron excess in the N = 20 projectile {sup 36} S on cross sections of fusion-evaporation fusion-evaporation reactions occurring on lead targets. 19 refs., 3 figs., 2 tabs.}
place = {JINR}
year = {1994}
month = {Dec}
}