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"Smetana, A."
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Measurement of double-$\\beta$ decay of $^{150}$Nd to the 0$^+_1$ excited state of $^{150}$Sm in NEMO-3
2023
The NEMO-3 results for the double-$\\beta $ decay of $^{150}$Nd to the 0$^+_1$ and 2$^+_1$ excited states of $^{150}$Sm are reported. The data recorded during 5.25 year with 36.6 g of the isotope $^{150}$Nd are used in the analysis. The signal of the $2\\nu \\beta \\beta $ transition to the 0$^+_1$ excited state is detected with a statistical significance exceeding 5$\\sigma $. The half-life is measured to be $T_{1/2}^{2\\nu \\beta \\beta }(0^+_1) = \\left[ 1.11 ^{+0.19}_{-0.14} \\,\\left( \\hbox {stat}\\right) ^{+0.17}_{-0.15}\\,\\left( \\hbox {syst}\\right) \\right] \\times 10^{20}$ year, which is the most precise value that has been measured to date. 90% confidence-level limits are set for the other decay modes. For the $2\\nu \\beta \\beta $ decay to the 2$^+_1$ level the limit is $T^{2\\nu \\beta \\beta }_{1/2}(2^+_1) > 2.42 \\times 10^{20}~\\hbox {year}$. The limits on the $0\\nu \\beta \\beta $ decay to the 0$^+_1$ and 2$^+_1$ levels of $^{150}$Sm are significantly improved to $T_{1/2}^{0\\nu \\beta \\beta }(0^+_1) > 1.36 \\times 10^{22}~\\hbox {year}$ and $T_{1/2}^{0\\nu \\beta \\beta }(2^+_1) > 1.26 \\times 10^{22}~\\hbox {year}$.
Journal Article
Deviance as an historical artefact: a scoping review of psychological studies of body modification
by
Smetana, Michael R. A.
,
Owens, Rebecca
,
Lynn, Christopher D.
in
19th century
,
Academic disciplines
,
Bans
2023
Body modification is a blanket term for tattooing, piercing, scarring, cutting, and other forms of bodily alteration generally associated with fashion, identity, or cultural markings. Body modifications like tattooing and piercing have become so common in industrialised regions of the world that what were once viewed as marks of abnormality are now considered normal. However, the psychological motivations for body modification practices are still being investigated regarding deviance or risky behaviours, contributing to a sense in the academic literature that body modifications are both normal and deviant. We explored this inconsistency by conducting a scoping review of the psychological literature on body modifications under the assumption that the psychological and psychiatric disciplines set the standard for related research. We searched for articles in available online databases and retained those published in psychology journals or interdisciplinary journals where at least one author is affiliated with a Psychology or Psychiatry programme ( N = 94). We coded and tabulated the articles thematically, identifying five categories and ten subcategories. The most common category frames body modifications in general terms of risk, but other categories include health, identity, credibility/employability, and fashion/attractiveness. Trends in psychology studies seem to follow the shifting emphasis in the discipline from a clinical orientation regarding normality and abnormality to more complex social psychological approaches.
Journal Article
Growth and Characterization of Carbon Nanopearls on a Si Substrate by CVD Process
2009
Carbon nanopearls have been found to form on a Si substrate when grown at 850°C, using the chemical vapor deposition process (CVD). An acetylene carbon source and a Ni catalyst are the main ingredients for this procedure. The nickel was prepared and deposited on the substrate in two ways: (1) sonication and dispersion in a methanol solution, and (2) reduction of size via a reverse-micelle technique with a supercritical fluid deposition technique. The resulting carbon nanopearls were characterized using scanning electron microscopy (SEM), atomic force microscopy (AFM), and spectroscopic ellipsometry (SE). These tools enabled us to observe the structure, size, and absorption. Characterization of the carbon nanopearls is imperative for understanding of the structure and properties of these nanomaterials. [PUBLICATION ABSTRACT]
Journal Article
Detailed studies of \\^{100}\\ Mo two-neutrino double beta decay in NEMO-3
by
Filosofov, D
,
Smolnikov, A
,
Tedjditi, H
in
Beta decay
,
Electron energy
,
Electron energy distribution
2019
The full data set of the NEMO-3 experiment has been used to measure the half-life of the two-neutrino double beta decay of \\[^{100}\\]Mo to the ground state of \\[^{100}\\]Ru, \\[T_{1/2} = \\left[ 6.81 \\pm 0.01\\,\\left( \\text{ stat }\\right) ^{+0.38}_{-0.40}\\,\\left( \\text{ syst }\\right) \\right] \\times 10^{18}\\] year. The two-electron energy sum, single electron energy spectra and distribution of the angle between the electrons are presented with an unprecedented statistics of \\[5\\times 10^5\\] events and a signal-to-background ratio of \\[\\sim \\] 80. Clear evidence for the Single State Dominance model is found for this nuclear transition. Limits on Majoron emitting neutrinoless double beta decay modes with spectral indices of \\[\\mathrm{n}=2,3,7\\], as well as constraints on Lorentz invariance violation and on the bosonic neutrino contribution to the two-neutrino double beta decay mode are obtained.
Journal Article
Measurement of the double-β decay of 150Nd to the 01+ excited state of 150Sm in NEMO-3
by
Piquemal, F.
,
Chopra, A.
,
Waters, D.
in
Astronomy
,
Astrophysics and Cosmology
,
Confidence intervals
2023
The NEMO-3 results for the double-
β
decay of
150
Nd to the 0
1
+
and 2
1
+
excited states of
150
Sm are reported. The data recorded during 5.25 year with 36.6 g of the isotope
150
Nd are used in the analysis. The signal of the
2
ν
β
β
transition to the 0
1
+
excited state is detected with a statistical significance exceeding 5
σ
. The half-life is measured to be
T
1
/
2
2
ν
β
β
(
0
1
+
)
=
1
.
11
-
0.14
+
0.19
stat
-
0.15
+
0.17
syst
×
10
20
year, which is the most precise value that has been measured to date. 90% confidence-level limits are set for the other decay modes. For the
2
ν
β
β
decay to the 2
1
+
level the limit is
T
1
/
2
2
ν
β
β
(
2
1
+
)
>
2.42
×
10
20
year
. The limits on the
0
ν
β
β
decay to the 0
1
+
and 2
1
+
levels of
150
Sm are significantly improved to
T
1
/
2
0
ν
β
β
(
0
1
+
)
>
1.36
×
10
22
year
and
T
1
/
2
0
ν
β
β
(
2
1
+
)
>
1.26
×
10
22
year
.
Journal Article
Measurement of the double- $$\\varvec{\\beta }$$decay of$$\\varvec{^{150}}$$ Nd to the 0 $$\\varvec{^+_1}$$excited state of$$\\varvec{^{150}}$$ Sm in NEMO-3
2023
The NEMO-3 results for the double-$$\\beta $$β decay of$$^{150}$$150 Nd to the 0$$^+_1$$1 + and 2$$^+_1$$1 + excited states of$$^{150}$$150 Sm are reported. The data recorded during 5.25 year with 36.6 g of the isotope$$^{150}$$150 Nd are used in the analysis. The signal of the$$2\\nu \\beta \\beta $$2 ν β β transition to the 0$$^+_1$$1 + excited state is detected with a statistical significance exceeding 5$$\\sigma $$σ . The half-life is measured to be$$T_{1/2}^{2\\nu \\beta \\beta }(0^+_1) = \\left[ 1.11 ^{+0.19}_{-0.14} \\,\\left( \\hbox {stat}\\right) ^{+0.17}_{-0.15}\\,\\left( \\hbox {syst}\\right) \\right] \\times 10^{20}$$T 1 / 2 2 ν β β ( 0 1 + ) = 1 . 11 - 0.14 + 0.19 stat - 0.15 + 0.17 syst × 10 20 year, which is the most precise value that has been measured to date. 90% confidence-level limits are set for the other decay modes. For the$$2\\nu \\beta \\beta $$2 ν β β decay to the 2$$^+_1$$1 + level the limit is$$T^{2\\nu \\beta \\beta }_{1/2}(2^+_1) > 2.42 \\times 10^{20}~\\hbox {year}$$T 1 / 2 2 ν β β ( 2 1 + ) > 2.42 × 10 20 year . The limits on the$$0\\nu \\beta \\beta $$0 ν β β decay to the 0$$^+_1$$1 + and 2$$^+_1$$1 + levels of$$^{150}$$150 Sm are significantly improved to$$T_{1/2}^{0\\nu \\beta \\beta }(0^+_1) > 1.36 \\times 10^{22}~\\hbox {year}$$T 1 / 2 0 ν β β ( 0 1 + ) > 1.36 × 10 22 year and$$T_{1/2}^{0\\nu \\beta \\beta }(2^+_1) > 1.26 \\times 10^{22}~\\hbox {year}$$T 1 / 2 0 ν β β ( 2 1 + ) > 1.26 × 10 22 year .
Journal Article
Final results on \\{}^\\mathbf{82 }{\\hbox {Se}}\\ double beta decay to the ground state of \\{}^\\mathbf{82 }{\\hbox {Kr}}\\ from the NEMO-3 experiment
2018
Using data from the NEMO-3 experiment, we have measured the two-neutrino double beta decay (\\[2\\nu \\beta \\beta \\]) half-life of \\[^{82}\\]Se as \\[T_{\\smash {1/2}}^{2\\nu } \\!=\\! \\left[ 9.39 \\pm 0.17\\left( \\text{ stat }\\right) \\pm 0.58\\left( \\text{ syst }\\right) \\right] \\times 10^{19}\\] y under the single-state dominance hypothesis for this nuclear transition. The corresponding nuclear matrix element is \\[\\left| M^{2\\nu }\\right| = 0.0498 \\pm 0.0016\\]. In addition, a search for neutrinoless double beta decay (\\[0\\nu \\beta \\beta \\]) using 0.93 kg of \\[^{82}\\]Se observed for a total of 5.25 y has been conducted and no evidence for a signal has been found. The resulting half-life limit of \\[T_{1/2}^{0\\nu } > 2.5 \\times 10^{23} \\,\\text{ y } \\,(90\\%\\,\\text{ C.L. })\\] for the light neutrino exchange mechanism leads to a constraint on the effective Majorana neutrino mass of \\[\\langle m_{\\nu } \\rangle < \\left( 1.2{-}3.0\\right) \\,\\text{ eV }\\], where the range reflects \\[0\\nu \\beta \\beta \\] nuclear matrix element values from different calculations. Furthermore, constraints on lepton number violating parameters for other \\[0\\nu \\beta \\beta \\] mechanisms, such as right-handed currents, majoron emission and R-parity violating supersymmetry modes have been set.
Journal Article
Measurement of the double- $$\\varvec{\\beta }$$ β decay of $$\\varvec{^{150}}$$ 150 Nd to the 0 $$\\varvec{^+_1}$$ 1 + excited state of $$\\varvec{^{150}}$$ 150 Sm in NEMO-3
2023
Abstract The NEMO-3 results for the double- $$\\beta $$ β decay of $$^{150}$$ 150 Nd to the 0 $$^+_1$$ 1 + and 2 $$^+_1$$ 1 + excited states of $$^{150}$$ 150 Sm are reported. The data recorded during 5.25 year with 36.6 g of the isotope $$^{150}$$ 150 Nd are used in the analysis. The signal of the $$2\\nu \\beta \\beta $$ 2 ν β β transition to the 0 $$^+_1$$ 1 + excited state is detected with a statistical significance exceeding 5 $$\\sigma $$ σ . The half-life is measured to be $$T_{1/2}^{2\\nu \\beta \\beta }(0^+_1) = \\left[ 1.11 ^{+0.19}_{-0.14} \\,\\left( \\hbox {stat}\\right) ^{+0.17}_{-0.15}\\,\\left( \\hbox {syst}\\right) \\right] \\times 10^{20}$$ T 1 / 2 2 ν β β ( 0 1 + ) = 1 . 11 - 0.14 + 0.19 stat - 0.15 + 0.17 syst × 10 20 year, which is the most precise value that has been measured to date. 90% confidence-level limits are set for the other decay modes. For the $$2\\nu \\beta \\beta $$ 2 ν β β decay to the 2 $$^+_1$$ 1 + level the limit is $$T^{2\\nu \\beta \\beta }_{1/2}(2^+_1) > 2.42 \\times 10^{20}~\\hbox {year}$$ T 1 / 2 2 ν β β ( 2 1 + ) > 2.42 × 10 20 year . The limits on the $$0\\nu \\beta \\beta $$ 0 ν β β decay to the 0 $$^+_1$$ 1 + and 2 $$^+_1$$ 1 + levels of $$^{150}$$ 150 Sm are significantly improved to $$T_{1/2}^{0\\nu \\beta \\beta }(0^+_1) > 1.36 \\times 10^{22}~\\hbox {year}$$ T 1 / 2 0 ν β β ( 0 1 + ) > 1.36 × 10 22 year and $$T_{1/2}^{0\\nu \\beta \\beta }(2^+_1) > 1.26 \\times 10^{22}~\\hbox {year}$$ T 1 / 2 0 ν β β ( 2 1 + ) > 1.26 × 10 22 year .
Journal Article
Type Species Designation for Aculomicrus Smetana (Coleoptera: Hydrophilidae)
1990
In my revision of the New World genera of the tribe Omicrini of the hydrophilid subfamily Sphaeridiinae (1975, Stud. neotr. fauna 10:153-182), I accidentally failed to designate the type species for the newly erected genus Aculomicrus . To satisfy Art. 13b of the ICZN Code, and to make the name available, I hereby designate Aculomicrus minimus Smetana 1975 as the type species of Aculomicrus Smetana 1975.
Journal Article
Curculionoidea II
2013
Volume 8 of the Catalogue of Palaearctic Coleoptera provides a list of all taxa of the bulk of the family Curculionidae and of Cryptolaryngidae reported from the biogeographical realm covered. For the genus and species-groups taxa all available names are given, and for the valid species and subspecies the distribution per country is shown, including more details for endemic taxa. Type species are listed for all genus-group names. The work is based on verification of the primary sources, and the respective references are given. Particular chapters deal with the actual impediments of taxonomy, nomenclatural and taxonomic problems, and corrections to previously published volumes of the Catalogue.