The low-energy dipole strength distributions in Ho-165 and Tm-169 have
been studied in nuclear resonance fluorescence experiments at the
S-DALINAC utilizing a Euroball Cluster detector. In the energy interval
between 2.5 and 4.0 MeV, where the scissors mode is expected, 35 ground
state transitions could be observed in Ho-165 and 53 in Tm-169. Assuming
M1 character for all these transitions corresponds to Sigma B(M1) up
arrow= 1.54(23) mu(N)(2) and Sigma B(M1) up arrow= 2.15(63) mu(N)(2) for
Ho-165 and Tm-169, respectively. A statistical analysis is applied to
the measured spectra which is capable of reconstructing the complete
strength, including contributions of transitions below the observation
limit, with the ratio between M1 and E1 excitations and their total
strengths taken as an average over the even-mass neighbours. This
results in summed M1 transition strengths of Sigma B(M1) up arrow=
3.54(-0.95)(+0.75) mu(N)(2) (Ho-165) and Sigma B(M1) up arrow=
3.36(-0.57)(+1.00) mu(N)(2) (Tm-169). The large variations of the summed
dipole strength and the fragmentation in other deformed odd-mass nuclei
can be reproduced by the same statistical ansatz. The total low-lying M1
strength in heavy deformed odd-mass nuclei is in agreement with the
findings in the neighbouring even-mass nuclides as well as with sum-rule
predictions. (C) 1999 Elsevier Science B.V.
%0 Journal Article
%1 ISI:000078088200003
%A Huxel, N
%A von Brentano, P
%A Eberth, J
%A Enders, J
%A Herzberg, RD
%A von Neumann-Cosel, P
%A Nicolay, N
%A Pietralla, N
%A Prade, H
%A Rangacharyulu, C
%A Reif, J
%A Richter, A
%A Schlegel, C
%A Schwengner, R
%A Skoda, S
%A Thomas, HG
%A Wiedenhover, I
%A Winter, G
%A Zilges, A
%D 1999
%J Nuclear Physics A
%K imported myown zilges
%N 2
%P 239-261
%R 10.1016/S0375-9474(98)00610-1
%T Complete scissors mode strength in heavy deformed odd-mass nuclei: a
case study of Ho-165 and Tm-169
%V 645
%X The low-energy dipole strength distributions in Ho-165 and Tm-169 have
been studied in nuclear resonance fluorescence experiments at the
S-DALINAC utilizing a Euroball Cluster detector. In the energy interval
between 2.5 and 4.0 MeV, where the scissors mode is expected, 35 ground
state transitions could be observed in Ho-165 and 53 in Tm-169. Assuming
M1 character for all these transitions corresponds to Sigma B(M1) up
arrow= 1.54(23) mu(N)(2) and Sigma B(M1) up arrow= 2.15(63) mu(N)(2) for
Ho-165 and Tm-169, respectively. A statistical analysis is applied to
the measured spectra which is capable of reconstructing the complete
strength, including contributions of transitions below the observation
limit, with the ratio between M1 and E1 excitations and their total
strengths taken as an average over the even-mass neighbours. This
results in summed M1 transition strengths of Sigma B(M1) up arrow=
3.54(-0.95)(+0.75) mu(N)(2) (Ho-165) and Sigma B(M1) up arrow=
3.36(-0.57)(+1.00) mu(N)(2) (Tm-169). The large variations of the summed
dipole strength and the fragmentation in other deformed odd-mass nuclei
can be reproduced by the same statistical ansatz. The total low-lying M1
strength in heavy deformed odd-mass nuclei is in agreement with the
findings in the neighbouring even-mass nuclides as well as with sum-rule
predictions. (C) 1999 Elsevier Science B.V.
@article{ISI:000078088200003,
abstract = {The low-energy dipole strength distributions in Ho-165 and Tm-169 have
been studied in nuclear resonance fluorescence experiments at the
S-DALINAC utilizing a Euroball Cluster detector. In the energy interval
between 2.5 and 4.0 MeV, where the scissors mode is expected, 35 ground
state transitions could be observed in Ho-165 and 53 in Tm-169. Assuming
M1 character for all these transitions corresponds to Sigma B(M1) up
arrow= 1.54(23) mu(N)(2) and Sigma B(M1) up arrow= 2.15(63) mu(N)(2) for
Ho-165 and Tm-169, respectively. A statistical analysis is applied to
the measured spectra which is capable of reconstructing the complete
strength, including contributions of transitions below the observation
limit, with the ratio between M1 and E1 excitations and their total
strengths taken as an average over the even-mass neighbours. This
results in summed M1 transition strengths of Sigma B(M1) up arrow=
3.54(-0.95)(+0.75) mu(N)(2) (Ho-165) and Sigma B(M1) up arrow=
3.36(-0.57)(+1.00) mu(N)(2) (Tm-169). The large variations of the summed
dipole strength and the fragmentation in other deformed odd-mass nuclei
can be reproduced by the same statistical ansatz. The total low-lying M1
strength in heavy deformed odd-mass nuclei is in agreement with the
findings in the neighbouring even-mass nuclides as well as with sum-rule
predictions. (C) 1999 Elsevier Science B.V.},
added-at = {2019-11-20T10:09:48.000+0100},
author = {Huxel, N and von Brentano, P and Eberth, J and Enders, J and Herzberg, RD and von Neumann-Cosel, P and Nicolay, N and Pietralla, N and Prade, H and Rangacharyulu, C and Reif, J and Richter, A and Schlegel, C and Schwengner, R and Skoda, S and Thomas, HG and Wiedenhover, I and Winter, G and Zilges, A},
biburl = {https://www.bibsonomy.org/bibtex/2ef36d43c5f5b2e94a1e05941e7000e62/ikpcologne},
doi = {10.1016/S0375-9474(98)00610-1},
eissn = {1873-1554},
interhash = {73795046ac4c6e021235690368bda189},
intrahash = {ef36d43c5f5b2e94a1e05941e7000e62},
issn = {0375-9474},
journal = {Nuclear Physics A},
keywords = {imported myown zilges},
month = {JAN 11},
number = 2,
orcid-numbers = {Enders, Joachim/0000-0002-8441-378X
Pietralla, Norbert/0000-0002-4797-3032
Schwengner, Ronald/0000-0002-7620-8882
von Neumann-Cosel, Peter/0000-0002-0256-5940},
pages = {239-261},
researcherid-numbers = {Enders, Joachim/B-5501-2009
Herzberg, Rolf-Dietmar/E-1558-2011
Pietralla, Norbert/L-8465-2017
Schwengner, Ronald/Q-5959-2017
Zilges, Andreas/G-9984-2011},
timestamp = {2019-11-20T10:09:48.000+0100},
title = {Complete scissors mode strength in heavy deformed odd-mass nuclei: a
case study of Ho-165 and Tm-169},
unique-id = {ISI:000078088200003},
volume = 645,
year = 1999
}