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The radiative neutron capture on lithium-7 is calculated model independently using a low energy halo effective field theory. The cross section is expressed in terms of scattering parameters directly related to the S-matrix element. The…

Nuclear Theory · Physics 2011-07-21 Gautam Rupak , Renato Higa

The cross section for radiative capture of neutron on carbon-14 is calculated using the model-independent formalism of halo effective field theory. The dominant contribution from E1 transition is considered, and the cross section is…

Nuclear Theory · Physics 2015-06-04 Gautam Rupak , Lakma Fernando , Akshay Vaghani

The radiative neutron capture cross section of 207Pb has been measured at the CERN neutron time of flight installation n_TOF using the pulse height weighting technique in the resolved energy region. The measurement has been performed with…

Nuclear Experiment · Physics 2008-11-26 C. Domingo-Pardo

The continued interest to the study of the radiative neutron capture on atomic nuclei is caused, on the one hand, by the important role of this process in the analysis of many fundamental properties of nuclei and nuclear reactions, and, on…

Nuclear Theory · Physics 2014-01-29 S. B. Dubovichenko , A. V. Dzhazairov-Kakhramanov , N. A. Burkova

The possibility of the description of the available experimental data for cross sections of the neutron capture reaction on 10B at thermal and astrophysical energies, taking into account the resonance at 475 keV, was considered within the…

Nuclear Theory · Physics 2013-12-18 Sergey Dubovichenko , Albert Dzhazairov-Kakhramanov

In this work we study the radiative capture of ${\rm {}^3He}$ on ${\rm {}^4He}$ within the halo effective field theory (EFT) framework. At leading order the capture amplitude comprises the initial state $s$-wave strong and Coulomb…

Nuclear Theory · Physics 2018-05-29 Renato Higa , Gautam Rupak , Akshay Vaghani

Radiative capture of protons is investigated as a probe of clustering in nuclei far from stability. The first such measurement on a halo nucleus is reported here for the reaction $^6$He(p,$\gamma$) at 40 MeV. Capture into $^7$Li is observed…

Nuclear Experiment · Physics 2009-11-07 E. Sauvan , F. M. Marqués , H. W. Wilschut , N. A. Orr

The connection between the neutron halo observed in light neutron rich nuclei and the neutron radiative capture process is outlined. We show how nuclear structure information such as spectroscopic factors and external components of the…

Nuclear Theory · Physics 2007-05-23 A. Mengoni , T. Otsuka , T. Nakamura , M. Ishihara

We report a leading-order calculation of radiative ${}^{7}\mathrm{Li}$ neutron captures to both the ground and first excited state of ${}^{8}\mathrm{Li}$ in the framework of a low-energy effective field theory (Halo-EFT). Each of the…

Nuclear Theory · Physics 2014-03-05 Xilin Zhang , Kenneth M. Nollett , D. R. Phillips

The total cross sections of the 16O(n,gamma)17O radiative capture process is described in the framework of the modified potential cluster model with the classification of orbital states according to Young tableaux. The possibility to…

Nuclear Theory · Physics 2015-06-18 S B Dubovichenko , N V Afanasyeva , A V Dzhazairov-Kakhramanov

The total cross sections of the radiative neutron capture processes on 9Be, 14C, 14N, 15N, and 16O are described in the framework of the modified potential cluster model with the classification of orbital states according to Young tableaux.…

Nuclear Theory · Physics 2014-01-29 Sergey Dubovichenko , Albert Dzhazairov-Kakhramanov , Nadezhda Afanasyeva

The reaction rates of neutron capture reactions on light nuclei are important for reliably simulating nucleosynthesis in a variety of stellar scenarios. Neutron capture reaction rates on neutron-rich C-, N-, and O-isotopes are calculated in…

Nuclear Theory · Physics 2008-11-26 H. Herndl , R. Hofinger , J. Jank , H. Oberhummer , J. Goerres , M. Wiescher , F. -K. Thielemann , B. A. Brown

According to standard stellar evolution, lithium abundance is believed to be a useful indicator of the stellar age. However, many evolved stars like red giants show huge fluctuations around expected theoretical abundances that are not yet…

Nuclear Theory · Physics 2017-07-31 G. X. Dong , N. Michel , K. Fossez , M. Płoszajczak , Y. Jaganathen , R. M. Id Betan

Neutron capture by neutron-rich Li- and Be-isotopes plays a role in big--bang nucleosynthesis, especially in its inhomogeneous version and in the $\alpha$--process occurring in supernovae. New reaction rates for…

Nuclear Theory · Physics 2007-05-23 H. Herndl , R. Hofinger , P. Mohr , H. Oberhummer , T. Kajino , N. Terasawa

We outline a general method for computing nuclear capture reactions on the lattice. The method consists of two major parts. In this study we detail the second part which consists of calculating an effective two-body capture reaction on the…

Nuclear Theory · Physics 2014-02-27 Gautam Rupak , Dean Lee

Light radioactive nuclei play an important role in many astrophysical environments. Due to very low cross sections of some neutron and proton capture reactions by these radioactive nuclei at energies of astrophysical interest, direct…

Nuclear Theory · Physics 2014-11-20 V. Guimaraes , C. A. Bertulani

We calculate the cross section for radiative capture of neutron by deuteron $n+d \to 3H+\gamma$ using Effective Field Theory(EFT). The calculation includes N2LO order and we compare our results with available calculated data below E=0.2…

Nuclear Theory · Physics 2009-11-10 S. Bayegan , H. sadeghi

Within the framework of the modified potential cluster model with a classification of orbital states according to Young diagrams, the possibility of prediction absentee experimental data for the total cross sections of the radiative neutron…

Nuclear Theory · Physics 2019-11-14 S. B. Dubovichenko , N. A. Burkova , A. V. Dzhazairov-Kakhramanov

We employ an effective field theory (EFT) that exploits the separation of scales in the p-wave halo nucleus $^8\mathrm{B}$ to describe the process $^7\mathrm{Be}(p,\gamma)^8\mathrm{B}$ up to a center-of-mass energy of 500 keV. The…

Nuclear Theory · Physics 2018-10-03 Xilin Zhang , Kenneth M. Nollett , Daniel R. Phillips

Bayesian analysis of the radiative capture reactions $^3\mathrm{He}(\alpha,\gamma)^7\mathrm{Be}$ and $^3\mathrm{H}(\alpha,\gamma)^7\mathrm{Li}$ are performed to draw inferences about the cross sections at threshold. We do a model comparison…

Nuclear Theory · Physics 2020-07-15 Pradeepa Premarathna , Gautam Rupak
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