NEUTRINO MASS AND MIXING: THE IMPACT OF EXCITED STATE CONTRIBUTIONS ON CAPTURE RATES OF Ga DETECTORS

1995 ◽  
Vol 10 (01) ◽  
pp. 133-143 ◽  
Author(s):  
KAMALES KAR ◽  
SRUBABATI GOSWAMI ◽  
AMITAVA RAYCHAUDHURI
Keyword(s):  
Excited State ◽  
Cross Sections ◽  
Absorption Cross ◽  
Neutrino Mixing ◽  
Mixing Angle ◽  
Neutrino Mass And Mixing ◽  
Nuclear Models ◽  
The Impact ◽  
Neutrino Absorption ◽  
Capture Rates

In this paper we calculate the neutrino absorption cross-sections for the reaction 71Ga(ν, e−)71Ge using two simple nuclear models to account for the giant GT resonances. In both models the excited state contributions are found to have significant ranges of variation and affect the solar neutrino capture rates. Nonetheless, the regions in the neutrino mixing angle-mass squared difference plane allowed by the data from the Gallium detectors, when taken together with those from the Chlorine and Kamioka experiments, are found to be comparatively stable.

scholarly journals An improved glyoxal retrieval from OMI measurements

2014 ◽  
Vol 7 (12) ◽  
pp. 4133-4150 ◽  
Author(s):  
L. M. A. Alvarado ◽  
A. Richter ◽  
M. Vrekoussis ◽  
F. Wittrock ◽  
A. Hilboll ◽  
...  
Keyword(s):  
Cross Sections ◽  
Anthropogenic Activities ◽  
Absorption Cross ◽  
Fire Event ◽  
Data Set ◽  
Polynomial Degree ◽  
Temperature Boundary ◽  
Sensitivity Tests ◽  
Radiative Power ◽  
The Impact

Abstract. Satellite observations from the SCIAMACHY, GOME-2 and OMI spectrometers have been used to retrieve atmospheric columns of glyoxal (CHOCHO) with the DOAS method. High CHOCHO levels were found over regions with large biogenic and pyrogenic emissions, and hot-spots have been identified over areas of anthropogenic activities. This study focuses on the development of an improved retrieval for CHOCHO from measurements by the OMI instrument. From sensitivity tests, a fitting window and a polynomial degree are determined. Two different approaches to reduce the interference of liquid water absorption over oceanic regions are evaluated, achieving significant reduction of the number of negative columns over clear water regions. The impact of using different absorption cross-sections for water vapour is evaluated and only small differences are found. Finally, a high-temperature (boundary layer ambient: 294 K) absorption cross-section of nitrogen dioxide (NO2) is introduced in the DOAS retrieval to account for potential interferences of NO2 over regions with large anthropogenic emissions, leading to improved fit quality over these areas. A comparison with vertical CHOCHO columns retrieved from GOME-2 and SCIAMACHY measurements over continental regions is performed, showing overall good consistency. However, SCIAMACHY CHOCHO columns are systematically higher than those obtained from the other instruments. Using the new OMI CHOCHO data set, the link between fires and glyoxal columns is investigated for two selected regions in Africa. In addition, mapped averages are computed for a fire event in Russia between mid-July and mid-August 2010. In both cases, enhanced CHOCHO levels are found in close spatial and temporal proximity to elevated levels of MODIS fire radiative power, demonstrating that pyrogenic emissions can be clearly identified in the new OMI CHOCHO product.

scholarly journals Neutrino absorption cross sections in the supernova environment

2001 ◽  
Vol 511 (1) ◽  
pp. 11-18 ◽  
Author(s):  
J.M. Sampaio ◽  
K. Langanke ◽  
G. Martı́nez-Pinedo
Keyword(s):  
Cross Sections ◽  
Absorption Cross ◽  
Neutrino Absorption

Excited-state Absorption Cross Sections of a Phosphine-substituted Bithiophene

2009 ◽  
Author(s):  
Timothy M. Pritchett ◽  
Jianwei Wang ◽  
Christopher M. Lawson ◽  
Qun Zhao ◽  
Gary M. Gray
Keyword(s):  
Excited State ◽  
Cross Sections ◽  
Excited State Absorption ◽  
Absorption Cross

scholarly journals THEORETICAL OVERVIEW ON THE FLAVOR ISSUES OF MASSIVE NEUTRINOS

2012 ◽  
Vol 27 (28) ◽  
pp. 1230031 ◽  
Author(s):  
SHU LUO ◽  
ZHI-ZHONG XING
Keyword(s):  
Dipole Moments ◽  
Neutrino Mixing ◽  
Mixing Angle ◽  
Lepton Flavor ◽  
Mixing Parameters ◽  
Flavor Mixing ◽  
Majorana Neutrinos ◽  
Massive Neutrinos ◽  
The Impact ◽  
Theoretical Overview

We present an overview on some basic properties of massive neutrinos and focus on their flavor issues, including the mass spectrum, flavor mixing pattern and CP violation. The lepton flavor structures are explored by taking into account of the observed value of the smallest neutrino mixing angle θ13. The impact of θ13 on the running behaviors of other flavor mixing parameters is discussed in some detail. The seesaw-induced enhancement of the electromagnetic dipole moments for three Majorana neutrinos is also discussed in a TeV seesaw scenario.

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