Zobrazeno 1 - 10
of 163
pro vyhledávání: '"Zeiser, F."'
Autor:
Ingeberg, V. W., Siem, S., Wiedeking, M., Choplin, A., Goriely, S., Siess, L., Abrahams, K. J., Arnswald, K., Garrote, F. Bello, Bleuel, D. L., Cederkäll, J., Christoffersen, T. L., Cox, D. M., De Witte, H., Gaffney, L. P., Görgen, A., Henrich, C., Illana, A., Jones, P., Kheswa, B. V., Kröll, T., Majola, S. N. T., Malatji, K. L., Ojala, J., Pakarinen, J., Rainovski, G., Reiter, P., von Schmid, M., Seidlitz, M., Tveten, G. M., Warr, N., Zeiser, F.
Proton-$\gamma$ coincidences from $(\mathrm{d},\mathrm{p})$ reactions between a $^{66}\mathrm{Ni}$ beam and a deuterated polyethylene target have been analyzed with the inverse-Oslo method to find the nuclear level density (NLD) and $\gamma$-ray stre
Externí odkaz:
http://arxiv.org/abs/2307.07153
Autor:
Malatji, K. L., Beckmann, K. S., Wiedeking, M., Siem, S., Goriely, S., Larsen, A. C., Ay, K. O., Garrote, F. L. Bello, Campo, L. Crespo, Görgen, A., Guttormsen, M., Ingeberg, V. W., Jones, P., Kheswa, B. V., von Neumann-Cosel, P., Ozgur, M., Potel, G., Pellegri, L., Renstrøm, T., Tveten, G. M., Zeiser, F.
Publikováno v:
PRC 103 (2021) 014309
The Nuclear Level Densities (NLDs) and the $\gamma$-ray Strength Functions ($\gamma$SFs) of $^{153,155}$Sm have been extracted from (d,p$\gamma$) coincidences using the Oslo method. The experimental NLD of $^{153}$Sm is higher than the NLD of $^{155}
Externí odkaz:
http://arxiv.org/abs/2101.02809
Autor:
Markova, M., von Neumann-Cosel, P., Larsen, A. C., Bassauer, S., Görgen, A., Guttormsen, M., Garrote, F. L. Bello, Berg, H. C., Bjørøen, M. M., Dahl-Jacobsen, T., Eriksen, T. K., Gjestvang, D., Isaak, J., Mbabane, M., Paulsen, W., Pedersen, L. G., Pettersen, N. I. J., Richter, A., Sahin, E., Scholz, P., Siem, S., Tveten, G. M., Valsdottir, V. M., Wiedeking, M., Zeiser, F.
Publikováno v:
Phys. Rev . Lett. 127, 182501 (2021)
The validity of the Brink-Axel hypothesis, which is especially important for numerous astrophysical calculations, is addressed for 116,120,124Sn below the neutron separation energy by means of three independent experimental methods. The $\gamma$-ray
Externí odkaz:
http://arxiv.org/abs/2012.11956
Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes
Autor:
Guttormsen, M., Alhassid, Y., Ryssens, W., Ay, K. O., Ozgur, M., Algin, E., Larsen, A. C., Garrote, F. L. Bello, Campo, L. Crespo, Dahl-Jacobsen, T., Görgen, A., Hagen, T. W., Ingeberg, V. W., Kheswa, B. V., Klintefjord, M., Midtbø, J. E., Modamio, V., Renstrøm, T., Sahin, E., Siem, S., Tveten, G. M., Zeiser, F.
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 $^{142,144-151}$Nd which
Externí odkaz:
http://arxiv.org/abs/2012.01902
Autor:
Mücher, D., Spyrou, A., Wiedeking, M., Guttormsen, M., Larsen, A. C., Zeiser, F., Harris, C., Richard, A. L., Smith, M. K., Görgen, A., Liddick, S. N., Siem, S., Berg, H., Clark, J. A., DeYoung, P. A., Dombos, A. C., Greaves, B., Hicks, L., Kelmar, R., Lyons, S., Owens-Fryar, J., Palmisano, A., Santiago-Gonzalez, D., Savard, G., von Seeger, W. W.
The level density of quantum states in statistical mesoscopic systems is a critical input for various fields of physics, including nuclear physics, nuclear astrophysics, atomic physics and their applications. In atomic nuclei, the level density is a
Externí odkaz:
http://arxiv.org/abs/2011.01071
Autor:
Wiedeking, M., Guttormsen, M., Larsen, A. C., Zeiser, F., Görgen, A., Liddick, S. N., Mücher, D., Siem, S., Spyrou, A.
Publikováno v:
Phys. Rev. C 104, 014311 (2021)
The Shape method, a novel approach to obtain the functional form of the $\gamma$-ray strength function ($\gamma$SF) in the absence of neutron resonance spacing data, is introduced. When used in connection with the Oslo method the slope of the Nuclear
Externí odkaz:
http://arxiv.org/abs/2010.15696
Autor:
Zeiser, F., Tveten, G. M., Garrote, F. L. Bello, Guttormsen, M., Larsen, A. C., Ingeberg, V. W., Görgen, A., Siem, S.
Publikováno v:
NIM A 985 (2021) 164678
The new Oslo Scintillator Array (OSCAR) has been commissioned at the Oslo Cyclotron Laboratory (OCL). It consists of 30 large volume (diameter 3.5 x 8 inches) LaBr$_3$(Ce) detectors that are used for $\gamma$-ray spectroscopy. The response functions
Externí odkaz:
http://arxiv.org/abs/2008.06240
Autor:
Sanchez, R. Perez, Jurado, B., Meot, V., Roig, O., Dupuis, M., Bouland, O., Denis-Petit, D., Marini, P., Mathieu, L., Tsekhanovich, I., Aiche, M., Audouin, L., Cannes, C., Czajkowski, S., Delpech, S., Gorgen, A., Guttormsen, M., Henriques, A., Kessedjian, G., Nishio, K., Ramos, D., Siem, S., Zeiser, F.
Publikováno v:
Phys. Rev. Lett. 125, 122502 (2020)
Reliable neutron-induced reaction cross sections of unstable nuclei are essential for nuclear astrophysics and applications but their direct measurement is often impossible. The surrogate-reaction method is one of the most promising alternatives to a
Externí odkaz:
http://arxiv.org/abs/2002.05439
Autor:
Zeiser, F., Tveten, G. M., Potel, G., Larsen, A. C., Guttormsen, M., Laplace, T. A., Siem, S., Bleuel, D. L., Goldblum, B. L., Bernstein, L. A., Garrote, F. L. Bello, Campo, L. Crespo, Eriksen, T. K., Görgen, A., Hadynska-Klek, K., Ingeberg, V. W., Midtbø, J. E., Sahin, E., Tornyi, T., Voinov, A., Wiedeking, M., Wilson, J.
Publikováno v:
Phys. Rev. C 100, 024305 (2019)
The Oslo Method has been applied to particle-$\gamma$ coincidences following the $^{239}\mathrm{Pu}$(d,p) reaction to obtain the nuclear level density (NLD) and $\gamma$-ray strength function ($\gamma$SF) of $^{240}\mathrm{Pu}$. The experiment was co
Externí odkaz:
http://arxiv.org/abs/1904.02932
Autor:
Zeiser, F., Potel, G., Tveten, G. M., Larsen, A. C., Guttormsen, M., Laplace, T. A., Siem, S., Bleuel, D. L., Goldblum, B. L., Bernstein, L. A., Garrote, F. L. Bello, Campo, L. Crespo, Eriksen, T. K., Görgen, A., Hadynska-Klek, K., Midtbø, J. E., Renstrøm, T., Sahin, E., Tornyi, T., Voinov, A., Wiedeking, M.
Publikováno v:
Compound-Nuclear Reactions. Springer Proceedings in Physics, vol 254 (2021)
In this paper we present the first systematic analysis of the impact of the populated vs. intrinsic spin distribution on the nuclear level density and $\gamma$-ray strength function retrieved through the Oslo Method. We illustrate the effect of the s
Externí odkaz:
http://arxiv.org/abs/1902.02966