New Spectroscopic Measurements via Exotic Nuclear Rearrangement: The ReactionMg26(

Spectroscopic study of the exotic nucleusP25

“…Examples of experimental evidence of such states can be found in 19 Na [1], 16 Ne [2], 15 F [2], 15 Ne [3], and 23 Al [4]. Theory also predicts excited-core-based narrow states in 17 Na [5][6][7] and 21 Al [8].…”

“…[17]. The ANC of the mirror analogs of 21 Al-the 21 O-have been determined from the 20 O(d,p) 21 O reaction [18]. The ANC of the mirror analog of 25 P-the 25 Ne-can be determined in a similar fashion from a 24 Ne(d,p) 25 Ne experiment [12].…”

“…In this paper, we present a spectroscopic study of 25 P, a nucleus beyond the proton drip line that has the same isospin T = 5/2 as the two previously studied nuclei 17 Na and 21 Al. We aim to show that the 25 P has a rich low-lying spectrum that should be accessible to experimental study.…”

“…Earlier, we made the first predictions of the widths of a lighter T = 5/2 nucleus beyond the proton drip line, 21 Al [8], showing that several narrow states should be expected there. It was shown later in ab initio calculations [16] that the positions of the 21 Al levels can place important constraints on two-and three-nucleon (NN + NNN) chiral forces in nuclei. It can be expected that the 25 P levels will further constrain the nuclear forces.…”

“…[8] have been made by taking the theoretical positions of the proton resonances in 21 Al and exploiting the link between the widths of proton resonances and the asymptotic normalization coefficients (ANCs) of their mirror analogs, proposed in Ref. [17].…”