Time-Dependent Nuclear Decay Parameters: New Evidence for New Forces?

Fischbach, Ephraim; Buncher, John B.; Gruenwald, J. T.; Jenkins, Jere H.; Krause, D. E.; Mattes, J. J.; Newport, J. R.

doi:10.1007/978-1-4419-1362-3_12

Cited by 15 publications

(36 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The controversy started with the interpretation [7,8] of A ≈ 0.15% modulations in the decay rate measurements of a sealed 226 Ra reference source in an IC at the PTB between 1983 and 1998. The averaged residuals, shown in Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Parkhomov [10] found 7 data sets of beta-decaying radionuclides exhibiting periodic variations of 0.1% to 0.3% amplitude with a period of 1 year. Fischbach et al [8,14,15] suggested new theories in which the variable flux of anti-neutrinos from the Sun would significantly modulate the probability for β − emission. From metrological point of view, instability in the detection efficiency for a pure beta emitter can be expected due to the continuous energy distribution of the beta particle which makes the count rate subject to threshold variations at the low-energy side and possibly incomplete detection probability at the high-energy side.…”

Section: Discussionmentioning

confidence: 99%

“…Claims of variability of half-lives on the basis of deviations from an exponential decay curve can only be considered when the instrumental effects have been fully compensated and/or accounted for in the uncertainty budget. Jenkins et al [9] claim to have done so before proposing their hypothesis that permille sized seasonal variations of decay rates of 226 Ra and 36 Cl are caused by solar influences on their decay constants [6–8]. Evidence has been collected to demonstrate instabilities in the decay of other radionuclides [10,11] and by means of time-frequency analysis periodicity at shorter and longer term than 1 year have been claimed [11–13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evidence against solar influence on nuclear decay constants

et al. 2016

View full text Add to dashboard Cite

The hypothesis that proximity to the Sun causes variation of decay constants at permille level has been tested and disproved. Repeated activity measurements of mono-radionuclide sources were performed over periods from 200 days up to four decades at 14 laboratories across the globe. Residuals from the exponential nuclear decay curves were inspected for annual oscillations. Systematic deviations from a purely exponential decay curve differ from one data set to another and are attributable to instabilities in the instrumentation and measurement conditions. The most stable activity measurements of alpha, beta-minus, electron capture, and beta-plus decaying sources set an upper limit of 0.0006% to 0.008% to the amplitude of annual oscillations in the decay rate. Oscillations in phase with Earth’s orbital distance to the Sun could not be observed within a 10−6 to 10−5 range of precision. There are also no apparent modulations over periods of weeks or months. Consequently, there is no indication of a natural impediment against sub-permille accuracy in half-life determinations, renormalisation of activity to a distant reference date, application of nuclear dating for archaeology, geo- and cosmochronology, nor in establishing the SI unit becquerel and seeking international equivalence of activity standards.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evidence against solar influence on nuclear decay constants

et al. 2016

View full text Add to dashboard Cite

show abstract

“…None has had an effect, with the sole exception of decay modes that involve the orbital electrons, the physics of which is well understood [26]. More recently, an unexplained anomaly in the decay curve of 54 Mn was observed to be coincident with a strong solar flare, and statistical anomalies in other decay measurements made at Brookhaven National Laboratory and at the Physikalisch-Technische Bundesanstalt (PTB) were found to have annual periodicity [27, 28]. The cause was hypothesized to be related to solar neutrinos affecting the value of the decay constant.…”

Section: Data Quality and Good Sciencementioning

confidence: 99%

Believable statements of uncertainty and believable science

Lindstrom

2016

J Radioanal Nucl Chem

View full text Add to dashboard Cite

Nearly fifty years ago, two landmark papers appeared that should have cured the problem of ambiguous uncertainty statements in published data. Eisenhart’s paper in Science called for statistically meaningful numbers, and Currie’s Analytical Chemistry paper revealed the wide range in common definitions of detection limit. Confusion and worse can result when uncertainties are misinterpreted or ignored. The recent stories of cold fusion, variable radioactive decay, and piezonuclear reactions provide cautionary examples in which prior probability has been neglected. We show examples from our laboratory and others to illustrate the fact that uncertainty depends on both statistical and scientific judgment.

show abstract

“…keV and two more implementations were also made using the same technique as the first ones. Amplitudes of γ-variations, in contrast to variations of β-radiation, exceeded 20% [25]- [33]. Similarly, other records for isotopes of americium and cesium were processed; Spectra of realizations of γ-variation of (Figure 1).…”

Section: Experimental Approaches a Brief Review Of The Work On The Pmentioning

confidence: 99%

Five Years after Discovery Abnormal Neutrino Radioactive-Isotope (ANRI) Absorption

Khavroshkin¹,

Tsyplakov²

2018

OALib

View full text Add to dashboard Cite

Several years ago, the authors were finally convinced of the reality of the existence of the anomalous neutrino radioisotope (ANRI) absorption. Taking into account the applied and fundamental importance of the effect, as well as the need for thorough repetition and verification of the results of primary research, the authors repeated methodologically and technically the first effective work, but the ANRI-effect registration processes were additionally duplicated using a parallel recording channel operating on another principle (the appearance of a thermal field at decay processes). Both methods: radiometric and thermal, their results coincided both with the data of primary works, and also as well as with each other. Thus, the existence of the ANRI-effect is absolutely reliably proven.

show abstract

Time-Dependent Nuclear Decay Parameters: New Evidence for New Forces?

Cited by 15 publications

References 57 publications

Evidence against solar influence on nuclear decay constants

Evidence against solar influence on nuclear decay constants

Believable statements of uncertainty and believable science

Five Years after Discovery Abnormal Neutrino Radioactive-Isotope (ANRI) Absorption

Contact Info

Product

Resources

About