Free exciton (FX) and bound exciton (BX) in Al0.5Ga0.5N/Al0.35Ga0.65N multiple quantum wells (MQWs) with different Si-doping levels in the well layers are investigated by photoluminescence (PL) spectra. Low temperature (10 K) PL spectra identify a large binding energy of 87.4 meV for the BX in undoped sample, and 63.6 meV for the BX in Si-doped (2 × 10(18 ) cm(-3)) sample. They are attributed t...

We report observations from the (p,n) reaction on 12 C at 135 MeV. The experiment was performed with the beam-swinger neutron time-of-flight system at the Indiana University Cyclotron Facility. Neutrons were detected in large-volume plastic scintillation detectors located in three detector stations at 0 • , 24 • , and 45 • with respect to the undeflected beam line; the flight paths were 91 m, 9...

We have studied the multi-nucleon transfer reaction 12 C(7 Li,p) at E lab = 44 MeV, populating states in the oxygen isotope 18 O. The experiments were performed at the Tandem accelerator of the Maier-Leibniz Laboratory in Munich using the high-resolution Q3D magnetic spectrograph. States were populated up to an excitation energy of 21.2 MeV with an overall energy resolution of 45 keV, and 30 ne...

We present a lattice determination of the charm quark’s mass, using the mass of the Ds meson as experimental input. All errors are under control with the exception of the quenched approximation. Setting the scale with FK = 160MeV, our final result for the renormalization group invariant (RGI) quark mass is Mc = 1.654(45)GeV, which translates to mMS c (mc) = 1.301(34)GeV for the running mass in ...

Fission of cold nuclei is essentially a binary, adiabatic process, with only a minute probability for the emission of associated light charged clusters. In contrast, nuclear systems in fast heavy-ion reactions respond to significant mechanical and thermal stresses by exhibiting more complex, ternary and quaternary fission-like disintegration patterns. As an example, aligned ternary and quaterna...

anneal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 ccr12.coef . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 gcd.coef . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 genetic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 glhHm...

We present a new model of the blazar gamma-ray luminosity function (GLF) and the spectrum of the extragalactic gamma-ray background (EGRB), which is consistent with the observed distributions of EGRET blazars. The unified sequence of blazar spectral energy distribution (SED) is taken into account to make a nontrivial prediction for the EGRB spectrum and more realistic comparison with the data t...