Fast Rotation of the N = Z Nucleus 36 Ar
نویسندگان
چکیده
A highly-deformed rotational band has been identified in the N = Z nucleus 36 Ar. At high spin the band is observed to its presumed termination at I π = 16 + , while at low spin it has been firmly linked to previously known states in 36 Ar. Spins, parities, and absolute excitation energies have thus been determined throughout the band. Lifetime measurements establish a large low-spin quadrupole deformation (β 2 = 0.46 ± 0.03) and indicate a decreasing collectivity as the band termination is approached. With effectively complete spectroscopic information and a valence space large enough for significant collectivity to develop, yet small enough to be meaningfully approached from the shell model perspective, this rotational band in 36 Ar provides many exciting opportunities to test and compare complementary models of collective motion in nuclei.
منابع مشابه
ar X iv : n uc l - th / 0 10 40 36 v 1 1 1 A pr 2 00 1 Fast nuclear rotation and octupole deformation
The 150 Sm nucleus has been studied to high spins in a measurement of γ radiation following the 136 Xe(18 O,4n) 150 Sm, compound-nucleus reaction at beam energy of 76 MeV. The measurement was performed at NBI Risø using the NORDBALL array. Alternating parity, s=+1 band in 150 Sm has been observed up to spin I=22. This band is crossed by two aligned bands, corresponding to a reflection-symmetric...
متن کاملInvestigation of UV/TiO2-N photocatalytic degradation of AR 40 using response surface methodology (RSM)
Introduction: Advanced oxidation processes (AOPs) suggest a highly reactive, nonspecific oxidant namely hydroxyl radical (OH•), that oxidize a wide range of pollutants fast and non-selective in wastewater and water. Materials and methods: In this work, the nitrogen-doped titanium dioxide nanoparticles were primed by sol-gel method, characterized by X-ray diffraction and Scanning Elect...
متن کاملAssessment of Image Distortion from Head Rotation in Lateral Cephalometry
BACKGROUND The patient's head can be slightly rotated sagitally vertically or transversely within the head holding device. Because of such improper positions due to the head rotation, an error can occur in cephalometric measurements. The purpose of this study was to identify the potential projection errors of lateral cephalometric radiograph due to head rotation toward X-ray film in the vertica...
متن کاملSU(2)-Invariant Spin Liquids on the Triangular Lattice with Spinful Majorana Excitations
We describe a new class of spin liquids with global SU(2) spin rotation symmetry in spin 1/2 systems on the triangular lattice, which have real Majorana fermion excitations carrying spin S = 1. The simplest translationally-invariant mean-field state on the triangular lattice breaks time-reversal symmetry and is stable to fluctuations. It generically possesses gapless excitations along 3 Fermi l...
متن کاملFar-infrared vibration-rotation-tunneling spectroscopy of Ar-NH3: Intermolecular vibrations and effective angular potential energy surface
Two new intermolecular vibration-rotation-tunneling (VRT) bands of Ar-NH3 have been measured using tunable far infrared laser spectroscopy. We have unambiguously assigned these and a previously measured FIR band [ Gwo et al., Mol. Phys. 71,453 ( 1990) ] as II ( l,,n = 0) +B(O,,n = 0), 2( l,,n = 0) +-Z(O,,n = 0), and B(O,,n = 1) +-Z(O,,n = 0). The three upper states of these are found to be stro...
متن کامل