caa a22 4500 445369116 CHVBK 20180317142940.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s00340-010-4276-3 doi (NATIONALLICENCE)springer-10.1007/s00340-010-4276-3 Neutron halo isomers in stable nuclei and their possible application for the production of low energy, pulsed, polarized neutron beams of high intensity and high brilliance [Elektronische Daten] [D. Habs, M. Gross, P. Thirolf, P. Böni] We propose to search for neutron halo isomers populated via γ-capture in stable nuclei with mass numbers of about A=140-180 or A=40-60, where the 4s 1/2 or 3s 1/2 neutron shell model state reaches zero binding energy. These halo nuclei can be produced for the first time with new γ-beams of high intensity and small band width (≤0.1%) achievable via Compton back-scattering off brilliant electron beams, thus offering a promising perspective to selectively populate these isomers with small separation energies of 1eV to a fewkeV. Similar to single-neutron halo states for very light, extremely neutron-rich, radioactive nuclei (Hansen et al. in Annu. Rev. Nucl. Part. Sci. 45:591-634, 1995; Tanihata in J.Phys. G., Nucl. Part. Phys. 22:158-198, 1996; Aumann et al. in Phys. Rev. Lett. 84:35, 2000), the low neutron separation energy and short-range nuclear force allow the neutron to tunnel far out into free space much beyond the nuclear core radius. This results in prolonged half-lives of the isomers for the γ-decay back to the ground state in the 100ps-μs range. Similar to the treatment of photodisintegration of the deuteron, the neutron release from the neutron halo isomer via a second, low-energy, intense photon beam has a known much larger cross section with a typical energy threshold behavior. In the second step, the neutrons can be released as a low-energy, pulsed, polarized neutron beam of high intensity and high brilliance, possibly being much superior to presently existing beams from reactors or spallation neutron sources. Springer-Verlag, 2010 Habs D. Fakultät für Physik, Ludwig Maximilians Universität, 85748, Munich, Germany aut Gross M. Fakultät für Physik, Ludwig Maximilians Universität, 85748, Munich, Germany aut Thirolf P. Fakultät für Physik, Ludwig Maximilians Universität, 85748, Munich, Germany aut Böni P. Physik-Department E21, Technische Universität München, 85748, Garching, Germany aut Applied Physics B Springer-Verlag 103/2(2011-05-01), 485-499 0946-2171 103:2<485 2011 103 340 https://doi.org/10.1007/s00340-010-4276-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-010-4276-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Habs D. Fakultät für Physik, Ludwig Maximilians Universität, 85748, Munich, Germany aut NATIONALLICENCE 700 1- Gross M. Fakultät für Physik, Ludwig Maximilians Universität, 85748, Munich, Germany aut NATIONALLICENCE 700 1- Thirolf P. Fakultät für Physik, Ludwig Maximilians Universität, 85748, Munich, Germany aut NATIONALLICENCE 700 1- Böni P. Physik-Department E21, Technische Universität München, 85748, Garching, Germany aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 103/2(2011-05-01), 485-499 0946-2171 103:2<485 2011 103 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer