Determination of Pr-141(alpha, n)Pm-144 cross sections at energies of
relevance for the astrophysical p process using the gamma gamma
coincidence method
The reaction Pr-141(alpha, n)Pm-144 was investigated between E-alpha =
11 MeV and 15 MeV with the activation method using the gamma gamma
coincidence method with a segmented clover-type high-purity Germanium
(HPGe) detector. Measurements with four other HPGe detectors were
additionally made. The comparison proves that the gamma gamma
coincidence method is an excellent tool to investigate cross sections
down to the microbarn range. The (alpha, n) reaction at low energy is
especially suited to test alpha + nucleus optical-model potentials for
application in the astrophysical p process. The experimentally
determined cross sections were compared to Hauser-Feshbach statistical
model calculations using different optical potentials and generally an
unsatisfactory reproduction of the data was found. A local potential was
constructed to improve the description of the data. The consequences of
applying the same potential to calculate astrophysical (gamma, alpha)
rates for Pm-145 and Gd-148 were explored. In summary, the data and
further results underline the problems in global predictions of alpha +
nucleus optical potentials at astrophysically relevant energies.
%0 Journal Article
%1 ISI:000296518700009
%A Sauerwein, A.
%A Becker, H. W.
%A Dombrowski, H.
%A Elvers, M.
%A Endres, J.
%A Giesen, U.
%A Hasper, J.
%A Hennig, A.
%A Netterdon, L.
%A Rauscher, T.
%A Rogalla, D.
%A Zell, K. O.
%A Zilges, A.
%D 2011
%J Phys. Rev. C
%K imported myown zilges
%N 4
%R 10.1103/PhysRevC.84.045808
%T Determination of Pr-141(alpha, n)Pm-144 cross sections at energies of
relevance for the astrophysical p process using the gamma gamma
coincidence method
%V 84
%X The reaction Pr-141(alpha, n)Pm-144 was investigated between E-alpha =
11 MeV and 15 MeV with the activation method using the gamma gamma
coincidence method with a segmented clover-type high-purity Germanium
(HPGe) detector. Measurements with four other HPGe detectors were
additionally made. The comparison proves that the gamma gamma
coincidence method is an excellent tool to investigate cross sections
down to the microbarn range. The (alpha, n) reaction at low energy is
especially suited to test alpha + nucleus optical-model potentials for
application in the astrophysical p process. The experimentally
determined cross sections were compared to Hauser-Feshbach statistical
model calculations using different optical potentials and generally an
unsatisfactory reproduction of the data was found. A local potential was
constructed to improve the description of the data. The consequences of
applying the same potential to calculate astrophysical (gamma, alpha)
rates for Pm-145 and Gd-148 were explored. In summary, the data and
further results underline the problems in global predictions of alpha +
nucleus optical potentials at astrophysically relevant energies.
@article{ISI:000296518700009,
abstract = {The reaction Pr-141(alpha, n)Pm-144 was investigated between E-alpha =
11 MeV and 15 MeV with the activation method using the gamma gamma
coincidence method with a segmented clover-type high-purity Germanium
(HPGe) detector. Measurements with four other HPGe detectors were
additionally made. The comparison proves that the gamma gamma
coincidence method is an excellent tool to investigate cross sections
down to the microbarn range. The (alpha, n) reaction at low energy is
especially suited to test alpha + nucleus optical-model potentials for
application in the astrophysical p process. The experimentally
determined cross sections were compared to Hauser-Feshbach statistical
model calculations using different optical potentials and generally an
unsatisfactory reproduction of the data was found. A local potential was
constructed to improve the description of the data. The consequences of
applying the same potential to calculate astrophysical (gamma, alpha)
rates for Pm-145 and Gd-148 were explored. In summary, the data and
further results underline the problems in global predictions of alpha +
nucleus optical potentials at astrophysically relevant energies.},
added-at = {2019-11-20T10:09:48.000+0100},
article-number = {045808},
author = {Sauerwein, A. and Becker, H. W. and Dombrowski, H. and Elvers, M. and Endres, J. and Giesen, U. and Hasper, J. and Hennig, A. and Netterdon, L. and Rauscher, T. and Rogalla, D. and Zell, K. O. and Zilges, A.},
biburl = {https://www.bibsonomy.org/bibtex/2e17d2387e6c0f7145529a4c74af646ce/ikpcologne},
doi = {10.1103/PhysRevC.84.045808},
eissn = {2469-9993},
interhash = {176ba30014eb6fe6ceb7c48e14fca55c},
intrahash = {e17d2387e6c0f7145529a4c74af646ce},
issn = {2469-9985},
journal = {Phys. Rev. C},
keywords = {imported myown zilges},
month = {OCT 19},
number = 4,
orcid-numbers = {Rauscher, Thomas/0000-0002-1266-0642
Rogalla, Detlef/0000-0002-5404-2498
Becker, Hans-Werner/0000-0002-8860-4911},
researcherid-numbers = {Zilges, Andreas/G-9984-2011
Rauscher, Thomas/D-2086-2009},
timestamp = {2019-11-20T10:09:48.000+0100},
title = {Determination of Pr-141(alpha, n)Pm-144 cross sections at energies of
relevance for the astrophysical p process using the gamma gamma
coincidence method},
unique-id = {ISI:000296518700009},
volume = 84,
year = 2011
}