Simple interpretation of proton-neutron interactions in rare earth nuclei
6th International Conference of the Balkan-Physical-Union, İstanbul, Türkiye, 22 - 26 Ağustos 2006, cilt.899, ss.117-118, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Cilt numarası: 899
- Doi Numarası: 10.1063/1.2733064
- Basıldığı Şehir: İstanbul
- Basıldığı Ülke: Türkiye
- Sayfa Sayıları: ss.117-118
- İstanbul Üniversitesi Adresli: Evet
Özet
Empirical values of the average interactions of the last two protons and last two neutrons, delta V-pn, which can be obtained from double differences of binding energies, provide significant information about nuclear structure. Studies of delta V-pn showed striking behavior across major shell gaps and the relation of proton-neutron (p-n) interaction strengths to the increasing collectivity and onset of deformation in nuclei. Here we focus on the strong regularity at the delta V-pn values in A similar to 150-180 mass region. Experimentally, for each nucleus, the valence p-n interaction strengths increase systematically against the neutron number and it decreases for the observed last neutron number. These experimental results give almost nearly perfect parallel trajectories. A microscopic interpretation with a zero range delta-interaction in a Nilsson basis gives reasonable agreement for Er-W but more significant discrepancies appear for Gd and Dy.