Nuclear Data Sheets for A = 235

Abstract

A b s t r a c t : S p e c t r o s c o p i c d a t a a n d l e v e l s c h e m e s f r o m r a d i o a c t i v e d e c a y a n d n u c l e a r r e a c t i o n s t u d i e s a r e presented here for all nuclei with mass number A=235. The highlight of this evaluation consists of the precise and comprehensive Coulomb excitation study (2012Wa35) on 2 3 5 U , w h i c h i n a d d i t i o n t o t h e 7 / 2 [ 7 4 3 ] g r o u n d s t a t e r o t a t i o n a l b a n d , e x t e n d e d t h e 1 / 2 [ 6 3 1 ] , 5 / 2 [ 6 2 2 ] , 5/2[752], and 3/2[631] rotational bands up to Jπ =53/2+, 49/2+, 41/2-, and 43/2+, respectively. This evaluation presents a study (2010Hu02) of the 2 3 7 Np( 1 1 6 Sn, 1 1 8 Snγ ) reaction where the ground state rotational band 5/2[642] was observed up to Jπ =(53/2+). I t i s w o r t h f o r h i s t o r i c a l k n o w l e d g e t o m e n t i o n t h e r e p o r t o n t h e " D i s c o v e r y o f i s o t o p e s o f t h e t r a n s u r a n i u m elements with 93<= Z <=98 " (2013Fr02), where the information for elements Np, Pu, and Am with mass number A= 235 is given. 235 Cf has not been observed.

Search for the Ga73 ground-state doublet splitting in the β decay of Zn73

“…At about the same time, Coulomb excitation was employed by Diriken et al [15] to study collectivity in 73 Ga. Their results provided evidence for the 1/2 − -3/2 − doublet close to the ground state with an energy splitting below 0.8 keV. This fact shows the exotic character of the first excited 3/2 − in 73 Ga, since typical nuclear excitation energies are 10 2 to 10 4 times larger and there are very few isotopes among the whole nuclear landscape with excited states in the eV energy range [16][17][18].…”

Study of the photon strength functions and level density in the gamma decay of the n + 234U reaction

“…[9]. The levels and transitions below E crit are taken from ENSDF database [10]. To ensure satisfactory statistics concerning the modelled quantities, 20 nuclear realizations with 10 5 γ-cascades per realization were simulated for each combination of LD and PSFs models.…”

Resonant Electronic-Bridge Excitation of the U235 Nuclear Transition in Ions with Chaotic Spectra

“…In order to calculate properties of the E3 transition we require the reduced nuclear matrix element B(E3, m → g). This can be obtained by considering the internal conversion of the 235 U atom, which has a halflife of approximately 26 min [15]. Following the conventions of [29] we define the hyperfine-interaction Hamiltonian between nuclear operators M λ K and usual electronic hyperfine-interaction operators T Kλ as…”

“…This transition has received far less attention because its energy is in the extreme ultraviolet (EUV) and it is a much weaker (E3) transition than the 229 Th (M 1) transition. However it also has some advantages: its location and properties are quite well known compared to the 229 Th isomeric transition (to ∼ 0.5 eV [15]); 235 U is more readily available than 229 Th; 235 U has a very long half-life; and chemical compounds of uranium are available to, for example, load atomic traps. It is also worth noting that the 235 U transition involves a change in nuclear shell: the Nilsson quantum numbers of the ground and metastable states are 7/2 − [743] and 1/2 + [631], respectively.…”