Measurement of the Solar Neutrino Capture Rate by the Russian-American Gallium Solar Neutrino Experiment During One Half of the 22-Year Cycle of Solar Activity

We present the results of measurements of the solar neutrino capture rate in gallium metal by the Russian-American Gallium Experiment SAGE during slightly more than half of a 22-year cycle of solar activity. Combined analysis of the data of 92 runs during the 12-year period January 1990 through December 2001 gives a capture rate of solar neutrinos with energy more than 233 keV of 70.8 +5.3/-5.2 (stat.) +3.7/-3.2 (syst.) SNU. This represents only slightly more than half of the predicted standard solar model rate of 128 SNU. We give the results of new runs beginning in April 1998 and the results of combined analysis of all runs since 1990 during yearly, monthly, and bimonthly periods. Using a simple analysis of the SAGE results combined with those from all other solar neutrino experiments, we estimate the electron neutrino pp flux that reaches the Earth to be (4.6 +/- 1.1) E10/(cm^2-s). Assuming that neutrinos oscillate to active flavors the pp neutrino flux emitted in the solar fusion reaction is approximately (7.7 +/- 1.8) E10/(cm^2-s), in agreement with the standard solar model calculation of (5.95 +/- 0.06) E10/(cm^2-s).Comment: English translation of article submitted to Russian journal Zh. Eksp. Teor. Fiz. (JETP); 12 pages, 5 figures. V2: Added winter-summer difference and 2 reference

The BNO-LNGS joint measurement of the solar neutrino capture rate in 71Ga

We describe a cooperative measurement of the capture rate of solar neutrinos by the reaction 71Ga(\nu_e,e^-)71Ge. Extractions were made from a portion of the gallium target in the Russian-American Gallium Experiment SAGE and the extraction samples were transported to the Gran Sasso laboratory for synthesis and counting at the Gallium Neutrino Observatory GNO. Six extractions of this type were made and the resultant solar neutrino capture rate was 64 ^{+24}_{-22} SNU, which agrees well with the overall result of the gallium experiments. The major purpose of this experiment was to make it possible for SAGE to continue their regular schedule of monthly solar neutrino extractions without interruption while a separate experiment was underway to measure the response of 71Ga to neutrinos from an 37Ar source. As side benefits, this experiment proved the feasibility of long-distance sample transport in ultralow background radiochemical experiments and familiarized each group with the methods and techniques of the other.Comment: 7 pages, no figures; minor additions in version

Measurement of the solar neutrino capture rate with gallium metal

The solar neutrino capture rate measured by the Russian-American Gallium Experiment (SAGE) on metallic gallium during the period January 1990 through December 1997 is 67.2 (+7.2-7.0) (+3.5-3.0) SNU, where the uncertainties are statistical and systematic, respectively. This represents only about half of the predicted Standard Solar Model rate of 129 SNU. All the experimental procedures, including extraction of germanium from gallium, counting of 71Ge, and data analysis are discussed in detail.Comment: 34 pages including 14 figures, Revtex, slightly shortene

Light Sterile Neutrinos: A White Paper

This white paper addresses the hypothesis of light sterile neutrinos based on recent anomalies observed in neutrino experiments and the latest astrophysical data

Risk factors for in vitro fertilization failures in women with adenomyosis-associated infertility

Aim. To identify risk factors for in vitro fertilization (IVF) failures in women with adenomyosis-associated infertility. Materials and methods. The study included 83 patients of reproductive age with adenomyosis. Women were divided into two groups: the main group (n=53) included patients with adenomyosis and a history of 1 or more unsuccessful attempts at embryo transfer, and the comparison group (n=30) included women with adenomyosis without impaired fertile function. The mean age of the patients was 364.0 years. Results. Gynecological conditions such as cervical dysplasia, noninflammatory vaginal diseases, and a history of sexually transmitted infections (STIs) were significantly (5-fold) more common in patients with a history of IVF failures (p0.05). A high prevalence of endocrine and digestive system disorders (27.7 and 7.7 times, respectively) was found in infertile women with adenomyosis (p0.05). Coagulation disorders were identified 4.8 times more often in women with adenomyosis-associated infertility and IVF failures. Inflammatory and proliferative endometrial diseases (hyperplasia, intrauterine synechia, and chronic endometritis) were significantly more common in patients in the main group than in patients with adenomyosis without impaired fertility (p0.05). Conclusion. Risk factors for IVF failure in women with adenomyosis-associated infertility are other specified coagulation defects [D68.8] (antiphospholipid syndrome), odds ratio (OR) 4.8, 95% confidence interval (CI) 1.120.9; dysplasia of cervix uteri, unspecified [N87.9] (OR 10.2, 95% CI 1.292.4), other noninflammatory disorders of vagina [N89.7] (OR 10.2, 95% CI 1.292.4), STIs (OR 12.7, 95% CI 1.4112.5), endocrine system disorders (OR 27.7, 95% CI 1.5516.5), and digestive system disorders (OR 7.8, 95% CI 2.227.8)

Measurement of the solar neutrino capture rate by SAGE and implications for neutrino oscillations in vacuum

The Russian-American solar neutrino experiment has measured the capture rate of neutrinos on metallic gallium in a radiochemical experiment at the Baksan Neutrino Observatory. Eight years of measurement give the result 67.2 (+7.2,-7.0) (+3.5,-3.0) SNU, where the uncertainties are statistical and systematic, respectively. The restrictions these results impose on vacuum neutrino oscillation parameters are given

Measurement of the solar neutrino capture rate by SAGE and implications for neutrino oscillations in vacuum

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Measurement of the solar neutrino capture rate with gallium metal

The solar neutrino capture rate measured by the Russian-American Gallium Experiment (SAGE) on metallic gallium during the period January 1990 through December 1997 is 67.2 (+7.2-7.0) (+3.5-3.0) SNU, where the uncertainties are statistical and systematic, respectively. This represents only about half of the predicted Standard Solar Model rate of 129 SNU. All the experimental procedures, including extraction of germanium from gallium, counting of 71Ge, and data analysis are discussed in detail