(radioactive) decay constant

q-Calculus and the Symmetrized Radioactive Decay Law

10.31219/osf.io/7mrbv ◽

2021 ◽

Author(s):

Shawn Eastmond

Keyword(s):

Radiocarbon Dating ◽

Decay Constant ◽

Radioactive Decay ◽

Logarithmic Function ◽

Ernest Rutherford ◽

Exponential Form ◽

Quantum Calculus ◽

Label Method ◽

Frederick Soddy ◽

Q Values

The radioactive decay law was first formulated by Ernest Rutherford and Frederick Soddy in 1902. As a well-known law, one of its primary applications is to determine the dates of ancient specimens. The process is known as radiocarbon dating and is subjected to the known properties of radioactive nuclei. In this paper, we implement quantum calculus to express the solution of the radioactive decay equation in symmetrized q-exponential form. Also, we explore a q-analog of the decay constant using Tsallis logarithmic function for various miscellaneous q-values. Furthermore, the factor-label method was applied to our analysis to show that the correct units remained intact under the application of quantum calculus. In conclusion, our work suggests that a variation of the q-parameter was akin to the production of a new isotope for all q in (0,1); the superadditive regime.

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Pressure Dependence of the Radioactive Decay Constant of Beryllium-7

Science ◽

10.1126/science.181.4105.1164 ◽

1973 ◽

Vol 181 (4105) ◽

pp. 1164-1165 ◽

Cited By ~ 38

Author(s):

W. K. Hensley ◽

W. A. Bassett ◽

J. R. Huizenga

Keyword(s):

Pressure Dependence ◽

Decay Constant ◽

Radioactive Decay

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Determining the Half Time and Analogy Constants of Radioactive Decay on the Illustration Board of Radioactive Decay with the Capacitor Filling and Discharging Method

Jurnal Pendidikan Fisika ◽

10.26618/jpf.v7i3.1707 ◽

2019 ◽

Vol 7 (3) ◽

pp. 306-316

Author(s):

Anggi Julvian Rachma ◽

Delia Achadina Putri ◽

Maria Ulfah ◽

Dandan Luhur Saraswati

Keyword(s):

Experimental Data ◽

Half Life ◽

Decay Constant ◽

Radioactive Decay ◽

Radioactive Substance ◽

Half Time ◽

Radioactive Elements ◽

Decay Constants ◽

Significant Difference ◽

Very High

Radioactive decay is one of the material to be learned students in the study of physics. However, until now students only learn concepts through existing teaching materials. This is because, the level of danger is very high if students have to deal with radioactive elements. So, it does not allow students to experiment with decay directly. Through an illustration board of radioactive decay, students can learn radioactive decay events by illustrating radioactive decay by capacitor filling and emptying methods. In addition, through this props, students can determine the value of the decay constant and the half-life of a radioactive substance. Based on the results of experiments using capacitors (C) of 4700 μF and resistors (R) of 56 kΩ, the percentage of theoretical experimental data deviation is 2.63% for decay constants, and 3.06% for half-life. This illustrates that there is no significant difference from the theoretical experimental data. So, it can be concluded that the illustration board of radioactive decay is suitable to be used as an illustration tool for radioactive decay events and determine the value of the characteristics of radioactive decay (decay constant and half-life).Keywords: Props, Radioactive Decay, Half-Life, Decay ConstantPeluruhan radioaktif merupakan salah satu materi yang harus dipelajari siswa dalam bidang studi fisika. Namun, sampai saat ini siswa hanya mempelajari konsep melalui bahan ajar yang ada. Hal tersebut dikarenakan, tingkat bahaya yang sangat tinggi jika siswa harus berhadapan dengan unsur radioaktif. Sehingga, tidak memungkinkan siswa melakukan percobaan peluruhan secara langsung. Melalui alat illustration board of radioactive decay, maka siswa dapat mempelajari peristiwa peluruhan radioaktif melalui pengilustrasian peluruhan radioaktif dengan metode pengisian dan pengosongan kapasitor. Selain itu, melalui alat peraga ini siswa dapat menentukan nilai konstanta peluruhan dan waktu paruh dari suatu zat radioaktif. Berdasarkan hasil percobaan dengan menggunakan kapasitor (C) sebesar 4700 μF dan resistor (R) sebesar 56 kΩ, diperoleh persentase penyimpangan data percobaan dengan teoritis sebesar 2,63% untuk konstanta peluruhan, dan 3,06% untuk waktu paruh. Hal tersebut menggambarkan bahwa tidak terdapat perbedaan yang signifikan dari data hasil percobaan dengan teoritis. Sehingga, dapat disimpulkan bahwa alat illustration board of radioactive decay cocok untuk dijadikan alat ilustrasi peristiwa peluruhan radioaktif dan menentukan nilai karakteristik peluruhan radioaktif (konstanta peluruhan dan waktu paruh).Kata kunci: Alat Peraga, Peluruhan Radioaktif, Waktu Paruh, Konstanta Peluruhan

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Meteorite Phosphates Show Constant 176Lu Decay Rate Since 4557 Million Years Ago

Science ◽

10.1126/science.1117919 ◽

2005 ◽

Vol 310 (5749) ◽

pp. 839-841 ◽

Cited By ~ 69

Author(s):

Yuri Amelin

Keyword(s):

Decay Rate ◽

Decay Constant ◽

Radioactive Decay ◽

Ordinary Chondrite ◽

The Earth ◽

Isotopic System

The use of radioactive decay of 176Lu to 176Hf to study the evolution of the Earth requires a precise and accurate value for the 176Lu decay constant. Recent determinations of this decay constant by age comparison to the more precisely calibrated U-Pb isotopic system produced internally consistent but discrepant values between terrestrial minerals and meteorites. New highly radiogenic Lu-Hf data for phosphate minerals from Richardton (ordinary chondrite) and Acapulco (primitive achondrite) yield decay constant values of 1.864 × 10–11 ± 0.016 × 10–11 and 1.832 × 10–11 ± 0.029 × 10–11 year–1, respectively, identical to the value determined from terrestrial minerals.

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Measurement of the Radioactive Decay Constant of ThC' Using a Coincidence Method

Physical Review ◽

10.1103/physrev.75.100 ◽

1949 ◽

Vol 75 (1) ◽

pp. 100-103 ◽

Cited By ~ 18

Author(s):

F. W. Van Name

Keyword(s):

Decay Constant ◽

Radioactive Decay ◽

Coincidence Method

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Metode Analisis Model Peluruhan Bahan Radioaktif dengan Menggunakan Sensor Gaya dan Rekaman Video

Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) ◽

10.20961/prosidingsnfa.v2i0.16412 ◽

2017 ◽

Vol 2 ◽

pp. 276

Author(s):

Yosephine Novita Apriati ◽

Ign Edi Santosa

Keyword(s):

Video Analysis ◽

Water Surface ◽

Decay Constant ◽

Radioactive Decay ◽

Force Sensor ◽

The Internet ◽

Radioactive Materials ◽

Vertical Column ◽

Exponential Law ◽

Video Record

Abstract: The number of decayed radioactive materials each time leads to the exponential law. Process of the decaying radioactive materials can’t easily be seen, so it can be modeled using the flow of water from a vertical column through a pipe. A force sensor can be used to collect data that showing the decline of water surface in a column. A pipe inserted in a tube contain of water is suspended in the force sensor. The force sensor is connected to a computer. The output shows an exponential graph identical to the exponential law of radioactive decay graph. Another method to collect data for height of water surface each time is using a camera. A video of the declining water surface can be analyzed using video analyzer from Logger Pro. The graph result is also identical with the radioactive decay graph. From both of the methods the decay constant can be found. By using a pipe with radius cm the decay constant for force sensor and camera methods consequently are and The method using a video record that being analyzed by video analyzer is easier to be done because the tools are easy to get. A camera can even be found in a cellphone and an application providing video analysis also can easily be downloaded from the internet. Abstrak: Jumlah bahan radioaktif yang meluruh setiap waktu mengikuti grafik eksponensial. Peristiwa peluruhan bahan radioaktif yang sulit diamati dapat dimodelkan dengan menggunakan peristiwa penurunan air dalam suatu tabung yang diberi pipa keluaran. Salah satu metode pencatatan data peristiwa penurunan tersebut dilakukan dengan menggunakan sensor gaya. Sebuah tabung berisi air yang diberi pipa keluaran digantungkan pada sebuah sensor gaya yang dihubungkan dengan komputer. Hasil grafik berat air setiap waktu menunjukkan grafik eksponensial yang identik dengan grafik peluruhan bahan radioaktif. Metode lain yang dapat dilakukan adalah dengan merekam ketinggian air setiap waktu di dalam tabung menggunakan kamera. Hasil rekaman dianalisis dengan menggunakan aplikasi video analyzer dari software Logger Pro. Hasil analisis menunjukkan ketinggian air setiap waktu mengikuti grafik peluruhan bahan radioaktif. Dengan menggunakan pipa keluaran berukuran cm diperoleh nilai konstanta peluruhan dengan metode sensor gaya dan metode rekaman secara berturut-turut adalah dan Metode dengan rekaman video yang dianalisis dengan aplikasi video analyzer dari software Logger Pro lebih mudah dilakukan karena hanya membutuhkan sebuah kamera perekam. Aplikasi video analyzer juga mudah diunduh di internet.

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Effect of nickel(II) on the biomass yield of the activated sludge

Water Science & Technology ◽

10.2166/wst.1996.0548 ◽

1996 ◽

Vol 34 (5-6) ◽

pp. 163-171 ◽

Cited By ~ 12

Author(s):

Celal F. Gökçay ◽

Ulku Yetis

Keyword(s):

Activated Sludge ◽

Decay Constant ◽

Biomass Yield ◽

Culture Conditions ◽

Synthetic Wastewater ◽

Base Line ◽

Microbial Culture ◽

Feed Composition ◽

Steady State Condition ◽

Applied Microbiology

Biomass yield of microorganisms is important in applied microbiology since it is the ultimate factor determining the amount of product produced regardless of whether product is growth-linked or not. In the case of environmental microbiology the opposite is true and minimizing the biomass produced, or the sludge in the relevant jargon, often is the prime goal. In this paper, a unique means of manipulating the microbial biomass yield of a heterogeneous culture to fulfil either of the two goals is presented. 5.0 mgl−1 Ni(II) in the feed composition to a completely mixed, once- through, activated sludge was found to induce the observed biomass yield of the microbial culture developed from sewage. As compared with the base-line study without Ni(II), where the reactor received synthetic wastewater only, true biomass yield was found to have increased along with the increased decay constant with the net effect of lowering observed biomass yield drastically at lower dilution rates and increasing it over that observed in the base-line study at higher dilution rates. At 10.0 mgl−1 influent Ni(II) concentration the culture conditions almost reverted back to the base- line study and at 25 mgl−1 Ni(II) concentration a truly steady-state condition could not be attained.

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