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.
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}
}
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}
}