Zobrazeno 1 - 10
of 273
pro vyhledávání: '"Tveten, G."'
Autor:
Paulsen, W., Li, K. C. W., Siem, S., Ingeberg, V. W., Larsen, A. C., Eriksen, T. K., Berg, H. C., Bjørøen, M. M., Coombes, B. J., Dowie, J. T. H., Furmyr, F. W., Garrote, F. L. B., Gjestvang, D., Görgen, A., Kibédi, T., Markova, M., Modamio, V., Sahin, E., Stuchbery, A. E, Tveten, G. M., Valsdòttir, V. M.
The radiative branching ratio of the Hoyle state is crucial to estimate the triple-$\alpha$ reaction rate in stellar environments at medium temperatures. Knowledge of the $\gamma$-decay channel is critical as this is the dominant radiative decay chan
Externí odkaz:
http://arxiv.org/abs/2406.00397
Autor:
Markova, M., Larsen, A. C., Tveten, G. M., von Neumann-Cosel, P., Eriksen, T. K., Garrote, F. L. Bello, Campo, L. Crespo, Giacoppo, F., Görgen, A., Guttormsen, M., Hadynska-Klek, K., Klintefjord, M., Renstrøm, T., Sahin, E., Siem, S., Tornyi, T. G.
Publikováno v:
Phys. Rev. C 108, 014315 (2023)
The $^{111,112,113}$Sn isotopes have been studied with ($p,d \gamma$), ($p,p^{\prime} \gamma$), and ($d,p \gamma$) reactions to extract the nuclear level densities (NLDs) and $\gamma$-ray strength functions (GSFs) of these nuclei below the neutron se
Externí odkaz:
http://arxiv.org/abs/2311.08865
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:
Utsunomiya, H., Goriely, S., Kimura, M., Shimizu, N., Utsuno, Y., Tveten, G. M., Renstrøm, T., Ari-izumi, T., Miyamoto, S.
Photoneutron emission cross sections were measured for $^{13}$C below $2n$ threshold using quasi-monochromatic $\gamma$-ray beams produced in laser Compton-scattering at the NewSUBARU synchrotron radiation facility. The data show fine structures in t
Externí odkaz:
http://arxiv.org/abs/2303.04194
Autor:
Larsen, A. C., Tveten, G. M., Renstrøm, T., Utsunomiya, H., Algin, E., Ari-izumi, T., Ay, K. O., Garrote, F. L. Bello, Campo, L. Crespo, Furmyr, F., Goriely, S., Görgen, A., Guttormsen, M., Ingeberg, V. W., Kheswa, B. V., Kullmann, I. K. B., Laplace, T., Lima, E., Markova, M., Midtbø, J. E., Miyamoto, S., Mjøs, A. H., Modamio, V., Ozgur, M., Pogliano, F., Riemer-Sørensen, S., Sahin, E., Shen, S., Siem, S., Spyrou, A., Wiedeking, M.
Publikováno v:
Phys. Rev. C 108, 025804 (2023)
In this work, we present new data on the $^{182,183,184}$W($\gamma,n$) cross sections, utilizing a quasi-monochromatic photon beam produced at the NewSUBARU synchrotron radiation facility. Further, we have extracted the nuclear level density and $\ga
Externí odkaz:
http://arxiv.org/abs/2301.13301
Autor:
Markova, M., Larsen, A. C., von Neumann-Cosel, P., Bassauer, S., Görgen, A., Guttormsen, M., Garrote, F. L. Bello, Berg, H. C., Bjørøen, M. M., 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.
Publikováno v:
Phys. Rev. C 106, 034322 (2022)
Nuclear level densities (NLDs) and $\gamma$-ray strength functions (GSFs) of $^{120,124}$Sn have been extracted with the Oslo method from proton-$\gamma$ coincidences in the ($p,p^{\prime}\gamma)$ reaction. The functional forms of the GSFs and NLDs h
Externí odkaz:
http://arxiv.org/abs/2301.05319
Autor:
Guttormsen, M., Ay, K. O., Ozgur, M., Algin, E., Larsen, A. C., Garrote, F. L. Bello, Berg, H. C., Campo, L. Crespo, Dahl-Jacobsen, T., Furmyr, F. W., Gjestvang, D., Görgen, A., Hagen, T. W., Ingeberg, V. W., Kheswa, B. V., Kullmann, I. K. B., Klintefjord, M., Markova, M., Midtbø, J. E., Modamio, V., Paulsen, W., Pedersen, L. G., Renstrøm, T., Sahin, E., Siem, S., Tveten, G. M., Wiedeking, M.
Publikováno v:
Phys. Rev. C 106, 034314 (2022)
The experimental gamma-ray strength functions (gamma-SFs) of 142,144-151Nd have been studied for gamma-ray energies up to the neutron separation energy. The results represent a unique set of gamma-SFs for an isotopic chain with increasing nuclear def
Externí odkaz:
http://arxiv.org/abs/2204.08852
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