We study bosons in the first excited Bloch band of a double-well optical lattice, recently realized at NIST. By calculating the relevant parameters from a realistic nonseparable lattice potential, we find that in the most favorable cases, the boson lifetime in the first excited band can be several orders of magnitude longer than the typical nearest-neighbor tunneling time scales, in contrast wi...

The half-life of the known I,Kp=4−,4− state in 170Er has been measured to be 42.8±1.7 ns. The rotational band built on this isomer was excited inelastically up to spin 18− by a 238U beam at Elab=1358 MeV. A similar band in 168Er was extended to spin 15−. The wave function of the isomeric state in 170Er has been determined from the measured ugK−gRu values, which were deduced from the intensity r...

We report on the lasing in air and pure nitrogen gas pumped by a single 800 nm femtosecond laser pulse. Depending on gas pressure, incident laser power and beam convergence, different lasing lines are observed in the forward direction with rapid change of their relative intensities. The lines are attributed to transitions between vibrational and rotational levels of the first negative band of t...

Single-snapshot line spectral estimation is carried out with one compressed sensing technique, Band-excluding Locally Optimized Orthogonal Matching Pursuit (BLOOMP), and two subspace-based methods, Multiple Signal Classification (MUSIC) and Estimation of Signal Parameters via Rotational Invariance Techniques (ESPRIT). Simulations show that for separation greater than 3 RL, BLOOMP is the best pe...

The bending fundamental bands o f HCCCN, v< and v6, have been recorded in the region from 470 to 700 cm -1 with a resolution o f 0.04 cm "' using an FT spectrometer. The band centers have been determined precisely; v5 = 663.2220(10) and v6 = 498.8022(10) cm -1 . From the ob­ tained effective rotational constants, the sign o f the /-type doubling constants has been deter­ mined to be positive fo...

The nuclear wobbling motion is studied from a microscopic viewpoint. It is shown that the expressions not only of the excitation energy but also of the electromagnetic transition rate in the microscopic RPA framework can be cast into the corresponding forms of the macroscopic rotor model. Criteria to identify the rotational band associated with the wobbling motion are given, based on which exam...

High-spin states of the neutron-rich odd nuclei Dy have been studied using the incomplete fusion reactions Gd( Li,(p ,d ,t)xn). In Dy, the band crossing in the 11/2@505# band has been observed for the first time. Moreover, 11 E1 transitions connecting both signatures of the 3/2@521# band to the 5/2@642# band have been observed in this nucleus; the deduced B(E1)/B(E2) ratios as well as the B(M1)...

With a 3.5 m diameter telescope passively cooled to approximately 80 K, and a science payload comprising two direct detection cameras/medium resolution imaging spectrometers (PACS and SPIRE) and a very high spectral resolution heterodyne spectrometer (HIFI), the Herschel Space Observatory is providing extraordinary observational opportunities in the 55-670 μm spectral range. HIFI has opened for...

accuracy of GROWL recon. (a)-(c): Reference image (a, 256x256), reconstruction using 8 radial lines with regridding (b) and GROWL (c). (d)-(e): Maximal correlation (d) and average rotational errors (e) with different no. of views. Fig. 1 GROWL reconstruction scheme. (a) The original undersampled dataset with a small Nyquist circle. (b) After each radial view is widened into a band using a GRAPP...

A number of vibrational-tunneling-rotational (VTR) transitions in the range of 195-298 GHz belonging to theΣ00 → Π10 hindered rotation band in Rg·ND3 (Rg = Ne, Kr) complexes are observed in absorption in a free supersonic jet, using the pulsed fast scan submillimeter wave spectroscopic technique (FASSST). The data obtained in this experiment, combined with previously obtained data on the Ar·ND3...