The low-lying excited states in the neutron-deficient N=Z+1 nucleus Tc444387 have been studied via the fusion-evaporation reaction Fe54(Ar36, 2n1p)Tc87 at the Grand Accélérateur National d'Ions Lourds (GANIL), France. The AGATA spectrometer was used in conjunction with the auxiliary NEDA, Neutron Wall, and DIAMANT detector arrays to measure coincident prompt γ rays, neutrons, and charged particles emitted in the reaction. A level scheme of Tc87 from the (9/2g.s.+) state to the (33/21+) state was established based on six mutually coincident γ-ray transitions. The constructed level structure exhibits a rotational behavior with a sharp backbending at ω≈0.50 MeV. A decrease in alignment frequency and increase in alignment sharpness in the odd-mass isotonic chains around N=44 is proposed as an effect of the enhanced isoscalar neutron-proton interactions in odd-mass nuclei when approaching the N=Z line.

Evidence for enhanced neutron-proton correlations from the level structure of the N=Z+1 nucleus Tc44 4387 [Evidence for enhanced neutron-proton correlations from the level structure of the N = Z+1 nucleus Tc-87(43)44] / X. Liu, B. Cederwall, C. Qi, R.A. Wyss, O. Aktas, A. Ertoprak, W. Zhang, E. Clement, G. De France, D. Ralet, A. Gadea, A. Goasduff, G. Jaworski, I. Kuti, B.M. Nyako, J. Nyberg, M. Palacz, R. Wadsworth, J.J. Valiente-Dobon, H. Al-Azri, A. Atac Nyberg, T. Back, G. De Angelis, M. Doncel, J. Dudouet, A. Gottardo, M. Jurado, J. Ljungvall, D. Mengoni, D.R. Napoli, C.M. Petrache, D. Sohler, J. Timar, D. Barrientos, P. Bednarczyk, G. Benzoni, B. Birkenbach, A.J. Boston, H.C. Boston, I. Burrows, L. Charles, M. Ciemala, F.C.L. Crespi, D.M. Cullen, P. Desesquelles, C. Domingo-Pardo, J. Eberth, N. Erduran, S. Erturk, V. Gonzalez, J. Goupil, H. Hess, T. Huyuk, A. Jungclaus, W. Korten, A. Lemasson, S. Leoni, A. Maj, R. Menegazzo, B. Million, R.M. Perez-Vidal, Z. Podolyak, A. Pullia, F. Recchia, P. Reiter, F. Saillant, M.D. Salsac, E. Sanchis, J. Simpson, O. Stezowski, C. Theisen, M. Zielinska. - In: PHYSICAL REVIEW C. - ISSN 2469-9985. - 104:2(2021 Aug 20), pp. L021302.1-L021302.5. [10.1103/PhysRevC.104.L021302]

Evidence for enhanced neutron-proton correlations from the level structure of the N=Z+1 nucleus Tc44 4387 [Evidence for enhanced neutron-proton correlations from the level structure of the N = Z+1 nucleus Tc-87(43)44]

F.C.L. Crespi;S. Leoni;A. Pullia;
2021-08-20

Abstract

The low-lying excited states in the neutron-deficient N=Z+1 nucleus Tc444387 have been studied via the fusion-evaporation reaction Fe54(Ar36, 2n1p)Tc87 at the Grand Accélérateur National d'Ions Lourds (GANIL), France. The AGATA spectrometer was used in conjunction with the auxiliary NEDA, Neutron Wall, and DIAMANT detector arrays to measure coincident prompt γ rays, neutrons, and charged particles emitted in the reaction. A level scheme of Tc87 from the (9/2g.s.+) state to the (33/21+) state was established based on six mutually coincident γ-ray transitions. The constructed level structure exhibits a rotational behavior with a sharp backbending at ω≈0.50 MeV. A decrease in alignment frequency and increase in alignment sharpness in the odd-mass isotonic chains around N=44 is proposed as an effect of the enhanced isoscalar neutron-proton interactions in odd-mass nuclei when approaching the N=Z line.
Settore FIS/01 - Fisica Sperimentale
Settore FIS/04 - Fisica Nucleare e Subnucleare
Article (author)
File in questo prodotto:
File Dimensione Formato  
PhysRevC.104.L021302.pdf

accesso aperto

Tipologia: Publisher's version/PDF
Dimensione 489.46 kB
Formato Adobe PDF
489.46 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/903333
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact