Search

Your search keyword '"Görgen, A"' showing total 24 results
Start Over Author "Görgen, A" Journal physics letters b
24 results on '"Görgen, A"'

1. Experimental observation of the M1 scissors mode in 254No

Author

F.L. Bello Garrote, A. Lopez-Martens, A.C. Larsen, I. Deloncle, S. Péru, F. Zeiser, P.T. Greenlees, B.V. Kheswa, K. Auranen, D.L. Bleuel, D.M. Cox, L. Crespo Campo, F. Giacoppo, A. Görgen, T. Grahn, M. Guttormsen, T.W. Hagen, L. Harkness-Brennan, K. Hauschild, G. Henning, R.-D. Herzberg, R. Julin, S. Juutinen, T.A. Laplace, M. Leino, J.E. Midtbø, V. Modamio, J. Pakarinen, P. Papadakis, J. Partanen, T. Renstrøm, K. Rezynkina, M. Sandzelius, J. Sarén, C. Scholey, S. Siem, J. Sorri, S. Stolze, and J. Uusitalo

Subjects
Scissors mode, γ-strength function, Transfermium nuclides, Physics, QC1-999
Abstract

We present the first experimental evidence of the scissors mode in the superheavy nucleus 254No produced in the 208Pb(48Ca, 2nγ))254No reaction. The spectrum of γ rays emitted by the excited 254No nuclei shows an enhanced γ-ray yield for transition energies of ≈2.5 MeV. By measuring the linear polarization properties of the emitted γ rays, we confirm that the transitions in the enhancement region are predominantly of magnetic-dipole character, characteristic for the scissors mode. To further characterize the enhanced γ-ray yield, simulations of the electromagnetic decay of 254No were performed. The observed enhancement is reproduced by including an M1 component in the γ strength function with total strength B(M1↑)=11.8(19)μN2. This is in good agreement with the integrated M1 strength from sum-rule estimates and new calculations within the quasi-particle random-phase approximation presented here. Our results provide a stringent test of phenomenological formulae for the scissors mode currently used in stellar nucleosynthesis calculations. We find that those formulae are not satisfactory, and we recommend using sum-rule estimates assuming a rigid-body moment of inertia instead for describing the scissors mode in superheavy nuclei.

Published
2022
Full Text
View/download PDF

2. Re-estimation of 180Ta nucleosynthesis in light of newly constrained reaction rates

Author

K.L. Malatji, M. Wiedeking, S. Goriely, C.P. Brits, B.V. Kheswa, F.L. Bello Garrote, D.L. Bleuel, F. Giacoppo, A. Görgen, M. Guttormsen, K. Hadynska-Klek, T.W. Hagen, V.W. Ingeberg, M. Klintefjord, A.C. Larsen, P. Papka, T. Renstrøm, E. Sahin, S. Siem, L. Siess, G.M. Tveten, and F. Zeiser

Subjects
Physics, QC1-999
Abstract

Recent measurements of the nuclear level densities and γ-ray strength functions below the neutron thresholds in 180,181,182Ta are used as input in the nuclear reaction code TALYS. These experimental average quantities are utilized in the calculations of the 179,180,181Ta radiative neutron capture cross sections. From the latter, astrophysical Maxwellian-averaged (n,γ) cross sections (MACS) and reaction rates are extracted, which in turn are used in large astrophysical network calculations to probe the production mechanism of 180Ta. These calculations are performed for two scenarios, the s-process production of 180,181Ta in Asymptotic Giant Branch (AGB) stars and the p-process nucleosynthesis of Tam180 in Type-II supernovae. Based on the results from this work, the s-process in stellar evolution is considered negligible in the production of Tam180 whereas 181Ta is partially produced by AGB stars. The new measurements strongly constrain the production and destruction rates of Tam180 at p-process temperatures and confirm significant production of nature's rarest stable isotope Tam180 by the p-process. Keywords: Nuclear level density, γ-ray strength function, (n,γ) cross sections, Maxwellian-averaged cross sections, Nucleosynthesis

Published
2019
Full Text
View/download PDF

3. Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes

Author

M. Guttormsen, Y. Alhassid, W. Ryssens, K.O. Ay, M. Ozgur, E. Algin, A.C. Larsen, F.L. Bello Garrote, L. Crespo Campo, T. Dahl-Jacobsen, A. Görgen, T.W. Hagen, V.W. Ingeberg, B.V. Kheswa, M. Klintefjord, J.E. Midtbø, V. Modamio, T. Renstrøm, E. Sahin, S. Siem, G.M. Tveten, and F. Zeiser

Subjects
Nuclear level density, Oslo method, Shell model Monte Carlo, Mean-field theory, Collective enhancement, Physics, QC1-999
Abstract

Understanding the evolution of level densities in the crossover from spherical to well-deformed nuclei has been a long-standing problem in nuclear physics. We measure nuclear level densities for a chain of neodymium isotopes 142,144−151Nd which exhibit such a crossover. These results represent the most complete data set of nuclear level densities to date for an isotopic chain between neutron shell-closure and towards mid-shell. We observe a strong increase of the level densities along the chain with an overall increase by a factor of ≈150 at an excitation energy of 6 MeV and saturation around mass 150. Level densities calculated by the shell model Monte Carlo (SMMC) are in excellent agreement with these experimental results. Based on our experimental and theoretical findings, we offer an explanation of the observed mass dependence of the level densities in terms of the intrinsic single-particle level density and the collective enhancement.

Published
2021
Full Text
View/download PDF

4. Low-lying electric dipole γ-continuum for the unstable 62,64Fe nuclei: Strength evolution with neutron number

Author

R. Avigo, O. Wieland, A. Bracco, F. Camera, F. Ameil, T. Arici, A. Ataç, D. Barrientos, D. Bazzacco, P. Bednarczyk, G. Benzoni, B. Birkenbach, N. Blasi, H.C. Boston, S. Bottoni, S. Brambilla, B. Bruyneel, M. Ciemała, E. Clément, M.L. Cortés, F.C.L. Crespi, D.M. Cullen, D. Curien, F. Didierjean, C. Domingo-Pardo, G. Duchêne, J. Eberth, A. Görgen, A. Gadea, J. Gerl, N. Goel, P. Golubev, V. González, M. Górska, A. Gottardo, E. Gregor, G. Guastalla, T. Habermann, L.J. Harkness-Brennan, A. Jungclaus, M. Kmiecik, I. Kojouharov, W. Korten, N. Kurz, M. Labiche, N. Lalović, S. Leoni, M. Lettmann, A. Maj, R. Menegazzo, D. Mengoni, E. Merchan, B. Million, A.I. Morales, D.R. Napoli, C. Nociforo, J. Nyberg, N. Pietralla, S. Pietri, Zs. Podolyák, V.Yu. Ponomarev, A. Pullia, B. Quintana, G. Rainovski, D. Ralet, F. Recchia, M. Reese, P. Regan, P. Reiter, S. Riboldi, D. Rudolph, M.D. Salsac, E. Sanchis, L.G. Sarmiento, H. Schaffner, J. Simpson, O. Stezowski, J.J. Valiente-Dobón, and H.J. Wollersheim

Subjects
64Fe, 62Fe, Nuclear structure, Dipole excitation around neutron threshold, Physics, QC1-999
Abstract

The γ-ray emission from the nuclei 62,64Fe following Coulomb excitation at bombarding energy of 400-440 AMeV was measured with special focus on E1 transitions in the energy region 4-8 MeV. The unstable neutron-rich nuclei 62,64Fe were produced at the FAIR-GSI laboratories and selected with the FRS spectrometer. The γ decay was detected with AGATA. From the measured γ-ray spectra the summed E1 strength is extracted and compared to microscopic quasi-particle phonon model calculations. The trend of the E1 strength with increasing neutron number is found to be fairly well reproduced with calculations that assume a rather complex structure of the 1− states (three-phonon states) inducing a strong fragmentation of the E1 nuclear response below the neutron binding energy.

Published
2020
Full Text
View/download PDF

5. Galactic production of 138La: Impact of 138,139La statistical properties

Author

B.V. Kheswa, M. Wiedeking, F. Giacoppo, S. Goriely, M. Guttormsen, A.C. Larsen, F.L. Bello Garrote, T.K. Eriksen, A. Görgen, T.W. Hagen, P.E. Koehler, M. Klintefjord, H.T. Nyhus, P. Papka, T. Renstrøm, S. Rose, E. Sahin, S. Siem, and T. Tornyi

Subjects
Physics, QC1-999
Abstract

The γ-ray strength functions and nuclear level densities of 138La and 139La have been measured below the neutron separation energies. These new data were used to calculate astrophysical Maxwellian-averaged (n,γ) cross-sections to investigate the production and destruction of the p-nucleus 138La in the photodisintegration process. The results confirm the underproduction of 138La in the p-process with respect to the observed abundances and strongly support the ν-process through νe capture on 138Ba as the main contributor to the synthesis of 138La in Type II supernovae. Keywords: γ-ray strength functions, Nuclear level densities, Maxwellian averaged cross-sections

Published
2015
Full Text
View/download PDF

6. Experimental observation of the M1 scissors mode in 254No

Author

Bello Garrote, F.L., primary, Lopez-Martens, A., additional, Larsen, A.C., additional, Deloncle, I., additional, Péru, S., additional, Zeiser, F., additional, Greenlees, P.T., additional, Kheswa, B.V., additional, Auranen, K., additional, Bleuel, D.L., additional, Cox, D.M., additional, Crespo Campo, L., additional, Giacoppo, F., additional, Görgen, A., additional, Grahn, T., additional, Guttormsen, M., additional, Hagen, T.W., additional, Harkness-Brennan, L., additional, Hauschild, K., additional, Henning, G., additional, Herzberg, R.-D., additional, Julin, R., additional, Juutinen, S., additional, Laplace, T.A., additional, Leino, M., additional, Midtbø, J.E., additional, Modamio, V., additional, Pakarinen, J., additional, Papadakis, P., additional, Partanen, J., additional, Renstrøm, T., additional, Rezynkina, K., additional, Sandzelius, M., additional, Sarén, J., additional, Scholey, C., additional, Siem, S., additional, Sorri, J., additional, Stolze, S., additional, and Uusitalo, J., additional

Published
2022
Full Text
View/download PDF

7. Pygmy dipole resonance in 124Sn populated by inelastic scattering of 17O

Author

L. Pellegri, A. Bracco, F.C.L. Crespi, S. Leoni, F. Camera, E.G. Lanza, M. Kmiecik, A. Maj, R. Avigo, G. Benzoni, N. Blasi, C. Boiano, S. Bottoni, S. Brambilla, S. Ceruti, A. Giaz, B. Million, A.I. Morales, R. Nicolini, V. Vandone, O. Wieland, D. Bazzacco, P. Bednarczyk, M. Bellato, B. Birkenbach, D. Bortolato, B. Cederwall, L. Charles, M. Ciemala, G. De Angelis, P. Désesquelles, J. Eberth, E. Farnea, A. Gadea, R. Gernhäuser, A. Görgen, A. Gottardo, J. Grebosz, H. Hess, R. Isocrate, J. Jolie, D. Judson, A. Jungclaus, N. Karkour, M. Krzysiek, E. Litvinova, S. Lunardi, K. Mazurek, D. Mengoni, C. Michelagnoli, R. Menegazzo, P. Molini, D.R. Napoli, A. Pullia, B. Quintana, F. Recchia, P. Reiter, M.D. Salsac, B. Siebeck, S. Siem, J. Simpson, P.-A. Söderström, O. Stezowski, Ch. Theisen, C. Ur, J.J. Valiente Dobon, and M. Zieblinski

Subjects
Physics, QC1-999
Abstract

The γ decay from the high-lying states of 124Sn was measured using the inelastic scattering of 17O at 340 MeV. The emitted γ rays were detected with high resolution with the AGATA demonstrator array and the scattered ions were detected in two segmented ΔE–E silicon telescopes. The angular distribution was measured both for the γ rays and the scattered 17O ions. An accumulation of E1 strength below the particle threshold was found and compared with previous data obtained with (γ,γ′) and (α,α′γ) reactions. The present results of elastic scattering, and excitation of E2 and E1 states were analysed using the DWBA approach. From this comprehensive description the isoscalar component of the 1− excited states was extracted. The obtained values are based on the comparison of the data with DWBA calculations including a form factor deduced using a microscopic transition density. Keywords: Low-lying electric dipole excitations, 124Sn, Isospin character

Published
2014
Full Text
View/download PDF

8. Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes

Author

Guttormsen, M., primary, Alhassid, Y., additional, Ryssens, W., additional, Ay, K.O., additional, Ozgur, M., additional, Algin, E., additional, Larsen, A.C., additional, Bello Garrote, F.L., additional, Crespo Campo, L., additional, Dahl-Jacobsen, T., additional, Görgen, A., additional, Hagen, T.W., additional, Ingeberg, V.W., additional, Kheswa, B.V., additional, Klintefjord, M., additional, Midtbø, J.E., additional, Modamio, V., additional, Renstrøm, T., additional, Sahin, E., additional, Siem, S., additional, Tveten, G.M., additional, and Zeiser, F., additional

Published
2021
Full Text
View/download PDF

9. Low-lying electric dipole γ-continuum for the unstable 62,64Fe nuclei: Strength evolution with neutron number

Author

Avigo, R., primary, Wieland, O., additional, Bracco, A., additional, Camera, F., additional, Ameil, F., additional, Arici, T., additional, Ataç, A., additional, Barrientos, D., additional, Bazzacco, D., additional, Bednarczyk, P., additional, Benzoni, G., additional, Birkenbach, B., additional, Blasi, N., additional, Boston, H.C., additional, Bottoni, S., additional, Brambilla, S., additional, Bruyneel, B., additional, Ciemała, M., additional, Clément, E., additional, Cortés, M.L., additional, Crespi, F.C.L., additional, Cullen, D.M., additional, Curien, D., additional, Didierjean, F., additional, Domingo-Pardo, C., additional, Duchêne, G., additional, Eberth, J., additional, Görgen, A., additional, Gadea, A., additional, Gerl, J., additional, Goel, N., additional, Golubev, P., additional, González, V., additional, Górska, M., additional, Gottardo, A., additional, Gregor, E., additional, Guastalla, G., additional, Habermann, T., additional, Harkness-Brennan, L.J., additional, Jungclaus, A., additional, Kmiecik, M., additional, Kojouharov, I., additional, Korten, W., additional, Kurz, N., additional, Labiche, M., additional, Lalović, N., additional, Leoni, S., additional, Lettmann, M., additional, Maj, A., additional, Menegazzo, R., additional, Mengoni, D., additional, Merchan, E., additional, Million, B., additional, Morales, A.I., additional, Napoli, D.R., additional, Nociforo, C., additional, Nyberg, J., additional, Pietralla, N., additional, Pietri, S., additional, Podolyák, Zs., additional, Ponomarev, V.Yu., additional, Pullia, A., additional, Quintana, B., additional, Rainovski, G., additional, Ralet, D., additional, Recchia, F., additional, Reese, M., additional, Regan, P., additional, Reiter, P., additional, Riboldi, S., additional, Rudolph, D., additional, Salsac, M.D., additional, Sanchis, E., additional, Sarmiento, L.G., additional, Schaffner, H., additional, Simpson, J., additional, Stezowski, O., additional, Valiente-Dobón, J.J., additional, and Wollersheim, H.J., additional

Published
2020
Full Text
View/download PDF

10. Re-estimation of 180Ta nucleosynthesis in light of newly constrained reaction rates

Author

Malatji, K.L., primary, Wiedeking, M., additional, Goriely, S., additional, Brits, C.P., additional, Kheswa, B.V., additional, Bello Garrote, F.L., additional, Bleuel, D.L., additional, Giacoppo, F., additional, Görgen, A., additional, Guttormsen, M., additional, Hadynska-Klek, K., additional, Hagen, T.W., additional, Ingeberg, V.W., additional, Klintefjord, M., additional, Larsen, A.C., additional, Papka, P., additional, Renstrøm, T., additional, Sahin, E., additional, Siem, S., additional, Siess, L., additional, Tveten, G.M., additional, and Zeiser, F., additional

Published
2019
Full Text
View/download PDF

11. The role of triaxiality for the coexistence and evolution of shapes in light krypton isotopes

Author

Michel Girod, A. Obertelli, J. P. Delaroche, and Andreas Görgen

Subjects
Physics, Formalism (philosophy of mathematics), Nuclear and High Energy Physics, Nuclear Theory, Quadrupole, Excitation spectra, Oblate spheroid, Physics::Atomic and Molecular Clusters, Degrees of freedom (statistics), Isotopes of krypton, Physics::Atomic Physics, Prolate spheroid, Atomic physics
Abstract

The structure of low-lying states in the light krypton isotopes 72Kr, 74Kr, and 76Kr has been studied with the finite-range Gogny D1S effective interaction via Hartree–Fock–Bogolyubov based calculations within a configuration-mixing formalism treating axial and triaxial quadrupole deformations. The good overall agreement with the experimental low-lying excitation spectra and matrix elements supports the shape coexistence scenario and a transition of the ground-state shape from oblate in 72Kr to prolate in 76Kr. The triaxial degree of freedom is shown to be crucial to reproduce the experimental data in general and the inversion of the oblate and prolate configurations in particular.

Published
2009
Full Text
View/download PDF

12. Relativistic Coulomb excitation of neutron-rich 54,56,58Cr: On the pathway of magicity from N=40 to N=32

Author

W. Korten, S. Brambilla, Hans Geissel, A. Banu, Taka Otsuka, I. Kojouharov, Benedicte Million, G Hammond, A. Maj, P. Reiter, A. Bracco, M. Kmiecik, G. Benzoni, F. Becker, Zsolt Podolyak, O. Wieland, A Kavatsyuk, A. Al-Khatib, O. Kavatsyuk, P. Bednarczyk, Emyr Clement, F. Nowacki, T.R. Saito, S. Muralithar, H. Hübel, H. J. Wollersheim, A. Bürger, C. Wheldon, M. Górska, M. Winkler, J. Gerl, Michio Honma, A. Neusser, F. Camera, Andreas Görgen, S. K. Mandal, Norio Saito, Amrendra K. Singh, P. Doornenbal, R. Lozeva, J. Grebosz, P. Bringel, Margareta Hellström, H. Grawe, N. Kurz, T. Beck, and Helmut Weick

Subjects
Physics, Nuclear and High Energy Physics, Excited state, Neutron number, SHELL model, Neutron, Coulomb excitation, Atomic physics, Excitation
Abstract

The first excited 2 + states in 54,56,58Cr were populated by Coulomb excitation at relativistic energies and γ rays were measured using the RISING setup at GSI. For 56Cr and 58Cr the B ( E2 , 2 1 + → 0 + ) values relative to the previously known B ( E 2 ) value for 54Cr are determined as 8.7(3.0) and 14.8(4.2) W.u., respectively. The results are consistent with a subshell closure at neutron number N = 32 which was already indicated by the higher energy of the 2 1 + state in 56Cr. Recent large-scale shell model calculations using effective interactions reproduce the trend in the excitation energies, but fail to account for the minimum in the B ( E 2 ) values at N = 32 .

Published
2005
Full Text
View/download PDF

13. Triaxial superdeformed bands in Lu and enhanced E1 decay-out strength

Author

M. Bergström, C. M. Petrache, S. M. Lenzi, Ragnar Bengtsson, G. Sletten, H. Hübel, C. A. Ur, A. Harsmann, D. R. Napoli, S. L. King, B. Herskind, D. M. Cullen, U. J. van Severen, B. Aengenvoort, Andreas Görgen, Henrik Jeldtoft Jensen, S. Odegard, S. Törmänen, R.A. Bark, H. Ryde, A. Bracco, G.B. Hagemann, R. Chapman, S. Frattini, Claes Fahlander, and P.O. Tjøm

Subjects
Superdeformation, Physics, Nuclear physics, Nuclear and High Energy Physics, Code (set theory), Isotope, Particle, Atomic physics
Abstract

In a search for exotic structures in odd-odd 164 Lu, performed as one of the first Euroball experiments eight new, presumably triaxial, superdeformed bands were found. For the first time, evidence is presented for superdeformation in an odd-odd Lu isotope for which theory predicts large triaxiality. The data are compared to expectations from calculations with the code “Ultimate Cranker”. Two of the bands are connected to normal-deformed structures and the E1 strength of the decay-out appears to be enhanced over single particle expectations, possibly due to octupole correlations.

Published
1999
Full Text
View/download PDF

14. Galactic production of 138 La: Impact of 138,139 La statistical properties

Author

Kheswa, B.V., primary, Wiedeking, M., additional, Giacoppo, F., additional, Goriely, S., additional, Guttormsen, M., additional, Larsen, A.C., additional, Bello Garrote, F.L., additional, Eriksen, T.K., additional, Görgen, A., additional, Hagen, T.W., additional, Koehler, P.E., additional, Klintefjord, M., additional, Nyhus, H.T., additional, Papka, P., additional, Renstrøm, T., additional, Rose, S., additional, Sahin, E., additional, Siem, S., additional, and Tornyi, T., additional

Published
2015
Full Text
View/download PDF

15. Pygmy dipole resonance in 124 Sn populated by inelastic scattering of 17 O

Author

Pellegri, L., primary, Bracco, A., additional, Crespi, F.C.L., additional, Leoni, S., additional, Camera, F., additional, Lanza, E.G., additional, Kmiecik, M., additional, Maj, A., additional, Avigo, R., additional, Benzoni, G., additional, Blasi, N., additional, Boiano, C., additional, Bottoni, S., additional, Brambilla, S., additional, Ceruti, S., additional, Giaz, A., additional, Million, B., additional, Morales, A.I., additional, Nicolini, R., additional, Vandone, V., additional, Wieland, O., additional, Bazzacco, D., additional, Bednarczyk, P., additional, Bellato, M., additional, Birkenbach, B., additional, Bortolato, D., additional, Cederwall, B., additional, Charles, L., additional, Ciemala, M., additional, De Angelis, G., additional, Désesquelles, P., additional, Eberth, J., additional, Farnea, E., additional, Gadea, A., additional, Gernhäuser, R., additional, Görgen, A., additional, Gottardo, A., additional, Grebosz, J., additional, Hess, H., additional, Isocrate, R., additional, Jolie, J., additional, Judson, D., additional, Jungclaus, A., additional, Karkour, N., additional, Krzysiek, M., additional, Litvinova, E., additional, Lunardi, S., additional, Mazurek, K., additional, Mengoni, D., additional, Michelagnoli, C., additional, Menegazzo, R., additional, Molini, P., additional, Napoli, D.R., additional, Pullia, A., additional, Quintana, B., additional, Recchia, F., additional, Reiter, P., additional, Salsac, M.D., additional, Siebeck, B., additional, Siem, S., additional, Simpson, J., additional, Söderström, P.-A., additional, Stezowski, O., additional, Theisen, Ch., additional, Ur, C., additional, Valiente Dobon, J.J., additional, and Zieblinski, M., additional

Published
2014
Full Text
View/download PDF

16. Evidence for shape coexistence at medium spin in 76Rb

Author

Wadsworth, R., primary, Ragnarsson, I., additional, Carlsson, B.G., additional, Ma, Hai-Liang, additional, Davies, P.J., additional, Andreoiu, C., additional, Austin, R.A.E., additional, Carpenter, M.P., additional, Dashdorj, D., additional, Freeman, S.J., additional, Garrett, P.E., additional, Greene, J., additional, Görgen, A., additional, Jenkins, D.G., additional, Johnston-Theasby, F., additional, Joshi, P., additional, Macchiavelli, A.O., additional, Moore, F., additional, Mukherjee, G., additional, Reviol, W., additional, Sarantites, D.G., additional, Seweryniak, D., additional, Svensson, C.E., additional, and Valiente-Dobón, J.J., additional

Published
2011
Full Text
View/download PDF

18. Relativistic Coulomb excitation of neutron-rich 54,56,58Cr: On the pathway of magicity from N=40 to N=32

Author

Bürger, A., primary, Saito, T.R., additional, Grawe, H., additional, Hübel, H., additional, Reiter, P., additional, Gerl, J., additional, Górska, M., additional, Wollersheim, H.J., additional, Al-Khatib, A., additional, Banu, A., additional, Beck, T., additional, Becker, F., additional, Bednarczyk, P., additional, Benzoni, G., additional, Bracco, A., additional, Brambilla, S., additional, Bringel, P., additional, Camera, F., additional, Clément, E., additional, Doornenbal, P., additional, Geissel, H., additional, Görgen, A., additional, Grębosz, J., additional, Hammond, G., additional, Hellström, M., additional, Honma, M., additional, Kavatsyuk, M., additional, Kavatsyuk, O., additional, Kmiecik, M., additional, Kojouharov, I., additional, Korten, W., additional, Kurz, N., additional, Lozeva, R., additional, Maj, A., additional, Mandal, S., additional, Million, B., additional, Muralithar, S., additional, Neußer, A., additional, Nowacki, F., additional, Otsuka, T., additional, Podolyák, Zs., additional, Saito, N., additional, Singh, A.K., additional, Weick, H., additional, Wheldon, C., additional, Wieland, O., additional, and Winkler, M., additional

Published
2005
Full Text
View/download PDF

19. The wobbling mode in 167Lu

Author

Amro, H, primary, Ma, W.C, additional, Hagemann, G.B, additional, Diamond, R.M, additional, Domscheit, J, additional, Fallon, P, additional, Görgen, A, additional, Herskind, B, additional, Hübel, H, additional, Jensen, D.R, additional, Li, Y, additional, Macchiavelli, A.O, additional, Roux, D, additional, Sletten, G, additional, Thompson, J, additional, Ward, D, additional, Wiedenhöver, I, additional, Wilson, J.N, additional, and Winger, J.A, additional

Published
2003
Full Text
View/download PDF

20. Evidence for octupole vibration in superdeformed 196Pb

Author

Roßbach, D., primary, Görgen, A., additional, Hübel, H., additional, Mergel, E., additional, Schönwaßer, G., additional, Wilson, A.N., additional, Azaiez, F., additional, Astier, A., additional, Bazzacco, D., additional, Bergström, M., additional, Bourgeois, C., additional, Buforn, N., additional, Hannachi, F., additional, Hauschild, K., additional, Korichi, A., additional, Korten, W., additional, Kröll, T., additional, Lopez-Martens, A., additional, Lucas, R., additional, Maier, H.J., additional, Redon, N., additional, Reiter, P., additional, Rossi-Alvarez, C., additional, Stezowski, O., additional, and Thirolf, P., additional

Published
2001
Full Text
View/download PDF

21. Conversion electron spectroscopy in the superdeformed minimum of 240Pu

Author

Gassmann, D., primary, Thirolf, P.G., additional, Mergel, E., additional, Habs, D., additional, Chromik, M., additional, Domscheit, J., additional, Görgen, A., additional, Hauschild, K., additional, Hübel, H., additional, Hunyadi, M., additional, Krasznahorkay, A., additional, Lopez-Martens, A., additional, Neumann, S., additional, Neußer, A., additional, Pansegrau, D., additional, Reiter, P., additional, Scheit, H., additional, Schönwaßer, G., additional, and Schwalm, D., additional

Published
2001
Full Text
View/download PDF

22. Triaxial superdeformed bands in Lu and enhanced E1 decay-out strength

Author

Törmänen, S., primary, Ødegård, S.W., additional, Hagemann, G.B., additional, Harsmann, A., additional, Bergström, M., additional, Bark, R.A., additional, Herskind, B., additional, Sletten, G., additional, Tjøm, P.O., additional, Görgen, A., additional, Hübel, H., additional, Aengenvoort, B., additional, van Severen, U.J., additional, Fahlander, C., additional, Napoli, D., additional, Lenzi, S., additional, Petrache, C., additional, Ur, C., additional, Jensen, H.J., additional, Ryde, H., additional, Bengtsson, R., additional, Bracco, A., additional, Frattini, S., additional, Chapman, R., additional, Cullen, D.M., additional, and King, S.L., additional

Published
1999
Full Text
View/download PDF

23. The wobbling mode in 167Lu

Author

Y. Li, J. Domscheit, Daniel Ward, H. Amro, D. R. Jensen, H. Hübel, I. Wiedenhöver, G. Sletten, R. M. Diamond, A. O. Macchiavelli, D. G. Roux, W. C. Ma, J. A. Winger, Andreas Görgen, G.B. Hagemann, P. Fallon, J. N. Wilson, J. Thompson, and B. Herskind

Subjects
Physics, Nuclear and High Energy Physics, Spin states, Deformation (mechanics), Excited state, Yrast, Nuclear Theory, Mode (statistics), Atomic physics, Wobbling mode, Triaxial deformation, Excitation
Abstract

High spin states in 167 Lu were populated through the 123 Sb( 48 Ca, xn ) reaction at 203 MeV. Four, presumably triaxial, strongly deformed (TSD) bands have been found in this nucleus. Several transitions linking an excited TSD band (TSD2) to the lowest (yrast) TSD band (TSD1) were observed. The electromagnetic properties of the connecting transitions have been investigated. Evidence for the assignment of TSD2 as a wobbling mode built on TSD1 is presented. This assignment is based on comparisons of the experimental data to theoretical calculations. The wobbling mode of excitation is an unambiguous signal of a stable triaxial deformation associated with these bands.

Full Text
View/download PDF

24. Evidence for shape coexistence at medium spin in 76Rb

Author

Wadsworth, R., Ragnarsson, I., Carlsson, B.G., Ma, Hai-Liang, Davies, P.J., Andreoiu, C., Austin, R.A.E., Carpenter, M.P., Dashdorj, D., Freeman, S.J., Garrett, P.E., Greene, J., Görgen, A., Jenkins, D.G., Johnston-Theasby, F., Joshi, P., Macchiavelli, A.O., Moore, F., Mukherjee, G., and Reviol, W.

Subjects
*NUCLEAR spin, *GAMMASPHERE, *NUCLEAR reactions, *NUMERICAL calculations, *NUCLEAR size (Physics), *NUCLEAR models
Abstract

Abstract: Four previously known rotational bands in 76Rb have been extended to moderate spins using the Gammasphere and Microball γ ray and charged particle detector arrays and the 40Ca(40Ca, 3pn) reaction at a beam energy of 165 MeV. The properties of two of the negative-parity bands can only readily be interpreted in terms of the highly successful Cranked Nilsson–Strutinsky model calculations if they have the same configuration in terms of the number of particles, but they result from different nuclear shapes (one near-oblate and the other near-prolate). These data appear to constitute a unique example of shape coexisting structures at medium spins. [Copyright &y& Elsevier]

Published
2011
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results