Título:
|
Strong neutron pairing in core+4n nuclei
|
Autores:
|
Fraile Prieto, Luis Mario ;
otros, ...
|
Tipo de documento:
|
texto impreso
|
Editorial:
|
American Physical Society, 2018-04-12
|
Dimensiones:
|
application/pdf
|
Nota general:
|
info:eu-repo/semantics/openAccess
|
Idiomas:
|
|
Palabras clave:
|
Estado = Publicado
,
Materia = Ciencias: Física: Física nuclear
,
Tipo = Artículo
|
Resumen:
|
The emission of neutron pairs from the neutron-rich N = 12 isotones ¹?C and ²?O has been studied by high-energy nucleon knockout from ¹?N and ²¹O secondary beams, populating unbound states of the two isotones up to 15 MeV above their two-neutron emission thresholds. The analysis of triple fragment-n-n correlations shows that the decay ¹?N (-1p)¹?C* ? ¹?C + n + n is clearly dominated by direct pair emission. The two- neutron correlation strength, the largest ever observed, suggests the predominance of a ¹?C core surrounded by four valence neutrons arranged in strongly correlated pairs. On the other hand, a significant competition of a sequential branch is found in the decay ²¹O(-1n)²?O*? ¹?O + n + n, attributed to its formation through the knockout of a deeply bound neutron that breaks the ¹?O core and reduces the number of pairs.
|
En línea:
|
https://eprints.ucm.es/47830/1/FrailePrieto32libre.pdf
|