Energy Levels inSm148andSm150

Abstract

Energy levels in Sm 148 and Sm 160 have been observed via the reactions Sm 147 (^)Sm 148 , Sm 149 (d,^>)Sm 150 , Sm 148 (^')Sm 148 , and Sm 150 (^,^')Sm 160 a t 12-MeV bombarding energy. Reaction products were analyzed in a 0.1% energy resolution magnetic spectrograph using emulsion techniques. Levels below 1.9-MeV excitation are found to have much smaller (d,p) cross sections than those above this energy. Many previously unknown levels above 1-MeV excitation have been found in both these nuclei. The observed levels are compared with previous studies of these nuclei. Several of the positive parity levels in Sm 148 can be fitted to an asymmetric rotor-vibrator spectrum. The excited states in Sm 160 can be approximated, but not fitted exactly, with this model. The observed low-lying states in these nuclei are discussed in terms of expected level structure for collective models. The ground-state Q values for the reactions Sm 147 (d,^>)Sm 148 and Sm 149 (#,/>)Sm 160 are determined to be 5920=bl0 keV and 5764±4 keV, respectively.

Freezing Stresses and Survival

“…These inclusions can be separated easily from living cells and studied as isolated systems. Freezing has been found to impair their ability to function (48,63,64,72,102,103). Effects of freezing on other enzymes and structures have also been investigated (18,152).…”

“…Plants such as tomatoes seem to be incapable of making this transi tion. The mitochondria are actively involved in plants that can be hardened because of energy requirements and utilization of ATP (63,64,72,102,103). In winter cereals, this transition usualIy occurs early in the falI.…”

Levels inU239

“…[8][9][10][11][12][13][14][15][16] It is obvious that this is a very powerful spectroscopic tool. The theory developed by Satchler 17 is particularly simple in the case of stripping on an eveneven target nucleus, leaving the residual nucleus in a state of angular momentum I with Nilsson quantum numbers 0 and N. The differential cross section is…”

Investigation of discrete states and quasidiscrete structures observed in Sm150 and Sm152 using the Humby1, Simón2, Beausang3 et al. 2016Phys. Rev. C6030View full textAdd to dashboardCite

“…It is possible that this is the NNDC level at 2655(7) keV [8,22,24,25]. A spin and parity of 3 (+) ,5 (+) was previously assigned to this level [25], suggesting that the level is a 3 − state based on the transition to the 2 + 1 state and the natural parity selection rule.…”