Abstract
This work has confirmed and extended the level scheme of {sup 164}W using the {sup 109} Ag({sup 58}Ni,p2n) reaction and identified for the first time levels in {sup 158}Hf (N=86) and {sup 162}W (N=88) using, respectively, {sup 107} Ag({sup 58}Ni,p2n){sup 162}W and {sup 107} Ag({sup 54}Fe,p2n){sup 158}Hf reactions. As a by-product, level schemes were also obtained for {sup 163}W and {sup 159}Hf, the latter being observed in two of the bombardments. The bulk of the measurements were carried out using 253 MeV,{sup 58}Ni and 233 MeV, {sup 54}Fe beams from the 88-inch cyclotron (in combination with the ECR source) at the Lawrence Berkeley Laboratory. Gamma-rays were observed in the 21-detector array, HERA. Additional measurements were carried out, and are still in progress at the ANU, 14 UD Pelletron facility. The alignment gain in the yrast band of {sup 162}W is proposed to be due to the h{sup 2}{sub 9/2} neutrons consistent in frequency and alignment with the CSM calculations. No regularity is discernible in the side-band sequences, assumed to be of negative parity, in either {sup 162}W or {sup 158}Hf, but further analysis is necessary to confirm the spin assignments. 12 refs., 7 figs.
Dracoulis, G D;
Fabricius, B;
Davidson, P M;
[1]
Macchiavelli, A O;
Oliviera, J;
Burde, J;
Stephens, F;
Deleplanque, M A
[2]
- Australian National Univ., Canberra, ACT (Australia). Research School of Physical Sciences
- Lawrence Berkeley Lab., CA (United States)
Citation Formats
Dracoulis, G D, Fabricius, B, Davidson, P M, Macchiavelli, A O, Oliviera, J, Burde, J, Stephens, F, and Deleplanque, M A.
Spectroscopy of very neutron-deficient hafnium and tungsten isotopes.
Australia: N. p.,
1992.
Web.
Dracoulis, G D, Fabricius, B, Davidson, P M, Macchiavelli, A O, Oliviera, J, Burde, J, Stephens, F, & Deleplanque, M A.
Spectroscopy of very neutron-deficient hafnium and tungsten isotopes.
Australia.
Dracoulis, G D, Fabricius, B, Davidson, P M, Macchiavelli, A O, Oliviera, J, Burde, J, Stephens, F, and Deleplanque, M A.
1992.
"Spectroscopy of very neutron-deficient hafnium and tungsten isotopes."
Australia.
@misc{etde_10146883,
title = {Spectroscopy of very neutron-deficient hafnium and tungsten isotopes}
author = {Dracoulis, G D, Fabricius, B, Davidson, P M, Macchiavelli, A O, Oliviera, J, Burde, J, Stephens, F, and Deleplanque, M A}
abstractNote = {This work has confirmed and extended the level scheme of {sup 164}W using the {sup 109} Ag({sup 58}Ni,p2n) reaction and identified for the first time levels in {sup 158}Hf (N=86) and {sup 162}W (N=88) using, respectively, {sup 107} Ag({sup 58}Ni,p2n){sup 162}W and {sup 107} Ag({sup 54}Fe,p2n){sup 158}Hf reactions. As a by-product, level schemes were also obtained for {sup 163}W and {sup 159}Hf, the latter being observed in two of the bombardments. The bulk of the measurements were carried out using 253 MeV,{sup 58}Ni and 233 MeV, {sup 54}Fe beams from the 88-inch cyclotron (in combination with the ECR source) at the Lawrence Berkeley Laboratory. Gamma-rays were observed in the 21-detector array, HERA. Additional measurements were carried out, and are still in progress at the ANU, 14 UD Pelletron facility. The alignment gain in the yrast band of {sup 162}W is proposed to be due to the h{sup 2}{sub 9/2} neutrons consistent in frequency and alignment with the CSM calculations. No regularity is discernible in the side-band sequences, assumed to be of negative parity, in either {sup 162}W or {sup 158}Hf, but further analysis is necessary to confirm the spin assignments. 12 refs., 7 figs.}
place = {Australia}
year = {1992}
month = {Nov}
}
title = {Spectroscopy of very neutron-deficient hafnium and tungsten isotopes}
author = {Dracoulis, G D, Fabricius, B, Davidson, P M, Macchiavelli, A O, Oliviera, J, Burde, J, Stephens, F, and Deleplanque, M A}
abstractNote = {This work has confirmed and extended the level scheme of {sup 164}W using the {sup 109} Ag({sup 58}Ni,p2n) reaction and identified for the first time levels in {sup 158}Hf (N=86) and {sup 162}W (N=88) using, respectively, {sup 107} Ag({sup 58}Ni,p2n){sup 162}W and {sup 107} Ag({sup 54}Fe,p2n){sup 158}Hf reactions. As a by-product, level schemes were also obtained for {sup 163}W and {sup 159}Hf, the latter being observed in two of the bombardments. The bulk of the measurements were carried out using 253 MeV,{sup 58}Ni and 233 MeV, {sup 54}Fe beams from the 88-inch cyclotron (in combination with the ECR source) at the Lawrence Berkeley Laboratory. Gamma-rays were observed in the 21-detector array, HERA. Additional measurements were carried out, and are still in progress at the ANU, 14 UD Pelletron facility. The alignment gain in the yrast band of {sup 162}W is proposed to be due to the h{sup 2}{sub 9/2} neutrons consistent in frequency and alignment with the CSM calculations. No regularity is discernible in the side-band sequences, assumed to be of negative parity, in either {sup 162}W or {sup 158}Hf, but further analysis is necessary to confirm the spin assignments. 12 refs., 7 figs.}
place = {Australia}
year = {1992}
month = {Nov}
}